George Moncur – (On for Naismith 75’) 6: Son of another former West Ham player, in John. Almost scored with first touch, curling shot just wide. Reuters
CHELSEA RATINGS: Kepa - 6: Had been total spectator until awful mistake with Luton’s first shot on target after half an hour when his wafer-weak wrists allowed Clark strike to creep into the net. Redeemed himself with fine one-handed save from Cornick on hour mark. Reliably unreliable. EPA
Reece James - 8: Curling cross to set up Abraham’s second and another storming run down right helped set up chance for Pulisic just before half hour. At the heart of most of Chelsea’s best work. Although, failed to put ball into stands in second half and the error almost led to Luton levelling. EPA
Kurt Zouma - 6: Looked to be struggling after picking up early knock and was slow to react when Clark was given time and space to score for Luton. Reuters
Andreas Christensen - 6: Strolled through opening with only the treacherous conditions underfoot giving him more cause for concern than Luton's attack. Reuters
Emerson - 5: Should have done more to block the cross for Clark’s goal and did not bomb forward as much as you would expect, particularly in first half. Subdued performance from the Brazilian. EPA
Mason Mount - 7: Given captain’s armband for first time, had Chelsea’s opening attempt on goal but saw shot deflected wide for corner. Superbly tackled by the referee in the first half. Fired great chance over bar 10 minutes into second half. EPA
Billy Gilmour - 7: The teenage midfielder was neat and tidy in possession, although no game-changing moments of magic to speak of going forward. AFP
Hakim Ziyech - 7: Really quiet first half from Moroccan who made little impact. Came to life after break as his lovely backheel set James off down wing, whipped in a low cross that Abraham was inches away from finishing, and then set-up glorious chance for Mount that midfielder should have finished. EPA
Timo Werner - 6: Lively start, had the beating of Lockyer down left but there was no one in middle to finish his low cross. His cut back set-up Abrahams for opening goal and produced lovely dummy to hand Pulisic opportunity that the American wasted. Poked Emerson cross wide just before break. Quiet in second half and poor penalty miss late on summed up confidence in front of goal at minute. PA
Tammy Abraham - 8: Could have had hat-trick in first half. Opened the scoring after 11 minutes with low shot into bottom corner and made it two with simple header five minutes later. Tapped home from one metre to complete treble in 74th minute, having missed headed opportunity moments earlier. EPA
Christian Pulisic - 5: Should have made it 3-0 in first half when one-on-one with keeper but poor finish easily saved and curled another effort over bar minutes later. Missed another great opportunity straight after half-time when his first-time shot was saved. Not his day. AFP
SUBS: Callum Hudson-Odoi – (On for Pulisic 70’) 7: Livened up Chelsea when he came on and his fine run and cross supplied the vital third goal for Abraham. Curled chance wide in last minute. Reuters
Kai Havertz – (On for Ziyech 77’) N/A. Reuters
Olivier Giroud – (On for Abraham 77’) N/A. Could have scored in last few minutes but curled chance straight at keeper. Reuters
Mateo Kovacic – (On for Mount 84’) N/A. AP
LUTON RATINGS: Simon Sluga - 7: Off his line quickly to stop Abrahams getting on end of through ball. Poor positioning for second, off his line, making it easy for Abraham to head it over him. Made a couple of decent stops to deny Pulisic, although American’s finishing was poor. Saved penalty from Werner that was nice height for keeper. AP
Tom Lockyer - 7: Welsh international was easily beaten to header by Abrahams for second goal but produced fine block on Pulisic cross soon after and also got crucial touch on ball to divert James’ cross away. AFP
James Bree - 6: Former Aston Villa defender produced determined run down right to earn Luton their first corner after 20 minutes and it was his cross that set up Clark’s goal. EPA
Sonny Bradley - 6: Like his defensive colleagues, threw himself into every challenge in the face of constant Chelsea pressure. Reuters
Glen Rea - 6: Couldn’t stretch out leg enough to block Chelsea opener but stuck to his task at the back as Chelsea dominated. Hooked at half-time as Luton changed formation. AFP
Kal Naismith - 6: Making his debut after signing on free transfer from Wigan and ran his heart out in tough conditions against top-level opposition. EPA
Ryan Tunnicliffe - 4: Switched off down left as Chelsea took quick throw down to start move for opening goal and found the going tough all afternoon. AP
Jordan Clark - 6: Pulled one back from nowhere with Luton’s first shot on target that Kepa should have saved after half an hour. Gave away late penalty with poor challenge on Werner. Getty
Kiernan Dewsbury-Hall - 7: On loan midfielder from Leicester produced one fine ball into box from free-kick just before break that looked for a second might earn team stunning equaliser. Was still picking out good passes in the last 10 minutes. AFP
Pelly-Ruddock Mpanzu - 6: Not afraid to run at the Chelsea defence but give little opportunity to do so as Luton mainly chased their opponents round the pitch. Werner claimed he should have had second-half penalty after Mpanzu tugged on his arm but the referee and VAR disagreed. Reuters
Harry Cornick - 6: Tough chance after 20 minutes that attacker could only head high and wide. Saw another header from Dewsbury-Hall cross just before half-time fly straight at Kepa. Denied his moment of glory by brilliant Kepa stop that stopped him levelling the scores on the hour. PA
SUBS: Dan Potts - (On for Rea 46’) 6: Son of former West Ham stalwart Steve, made decent impact after coming on. Getty
Luke Berry – (On for Tunnicliffe 61’) 5: Threw himself into battle. AP
Kazenga LuaLua – (On for Bree 61’) 6: Gave Luton a little more attacking impetus after coming on. AFP
James Collins - (On for Cornick 60’) 5: Top scorer was left on the bench and couldn't add to his season's tally after coming on. AP
George Moncur – (On for Naismith 75’) 6: Son of another former West Ham player, in John. Almost scored with first touch, curling shot just wide. Reuters
CHELSEA RATINGS: Kepa - 6: Had been total spectator until awful mistake with Luton’s first shot on target after half an hour when his wafer-weak wrists allowed Clark strike to creep into the net. Redeemed himself with fine one-handed save from Cornick on hour mark. Reliably unreliable. EPA
Reece James - 8: Curling cross to set up Abraham’s second and another storming run down right helped set up chance for Pulisic just before half hour. At the heart of most of Chelsea’s best work. Although, failed to put ball into stands in second half and the error almost led to Luton levelling. EPA
Kurt Zouma - 6: Looked to be struggling after picking up early knock and was slow to react when Clark was given time and space to score for Luton. Reuters
Andreas Christensen - 6: Strolled through opening with only the treacherous conditions underfoot giving him more cause for concern than Luton's attack. Reuters
Emerson - 5: Should have done more to block the cross for Clark’s goal and did not bomb forward as much as you would expect, particularly in first half. Subdued performance from the Brazilian. EPA
Mason Mount - 7: Given captain’s armband for first time, had Chelsea’s opening attempt on goal but saw shot deflected wide for corner. Superbly tackled by the referee in the first half. Fired great chance over bar 10 minutes into second half. EPA
Billy Gilmour - 7: The teenage midfielder was neat and tidy in possession, although no game-changing moments of magic to speak of going forward. AFP
Hakim Ziyech - 7: Really quiet first half from Moroccan who made little impact. Came to life after break as his lovely backheel set James off down wing, whipped in a low cross that Abraham was inches away from finishing, and then set-up glorious chance for Mount that midfielder should have finished. EPA
Timo Werner - 6: Lively start, had the beating of Lockyer down left but there was no one in middle to finish his low cross. His cut back set-up Abrahams for opening goal and produced lovely dummy to hand Pulisic opportunity that the American wasted. Poked Emerson cross wide just before break. Quiet in second half and poor penalty miss late on summed up confidence in front of goal at minute. PA
Tammy Abraham - 8: Could have had hat-trick in first half. Opened the scoring after 11 minutes with low shot into bottom corner and made it two with simple header five minutes later. Tapped home from one metre to complete treble in 74th minute, having missed headed opportunity moments earlier. EPA
Christian Pulisic - 5: Should have made it 3-0 in first half when one-on-one with keeper but poor finish easily saved and curled another effort over bar minutes later. Missed another great opportunity straight after half-time when his first-time shot was saved. Not his day. AFP
SUBS: Callum Hudson-Odoi – (On for Pulisic 70’) 7: Livened up Chelsea when he came on and his fine run and cross supplied the vital third goal for Abraham. Curled chance wide in last minute. Reuters
Kai Havertz – (On for Ziyech 77’) N/A. Reuters
Olivier Giroud – (On for Abraham 77’) N/A. Could have scored in last few minutes but curled chance straight at keeper. Reuters
Mateo Kovacic – (On for Mount 84’) N/A. AP
LUTON RATINGS: Simon Sluga - 7: Off his line quickly to stop Abrahams getting on end of through ball. Poor positioning for second, off his line, making it easy for Abraham to head it over him. Made a couple of decent stops to deny Pulisic, although American’s finishing was poor. Saved penalty from Werner that was nice height for keeper. AP
Tom Lockyer - 7: Welsh international was easily beaten to header by Abrahams for second goal but produced fine block on Pulisic cross soon after and also got crucial touch on ball to divert James’ cross away. AFP
James Bree - 6: Former Aston Villa defender produced determined run down right to earn Luton their first corner after 20 minutes and it was his cross that set up Clark’s goal. EPA
Sonny Bradley - 6: Like his defensive colleagues, threw himself into every challenge in the face of constant Chelsea pressure. Reuters
Glen Rea - 6: Couldn’t stretch out leg enough to block Chelsea opener but stuck to his task at the back as Chelsea dominated. Hooked at half-time as Luton changed formation. AFP
Kal Naismith - 6: Making his debut after signing on free transfer from Wigan and ran his heart out in tough conditions against top-level opposition. EPA
Ryan Tunnicliffe - 4: Switched off down left as Chelsea took quick throw down to start move for opening goal and found the going tough all afternoon. AP
Jordan Clark - 6: Pulled one back from nowhere with Luton’s first shot on target that Kepa should have saved after half an hour. Gave away late penalty with poor challenge on Werner. Getty
Kiernan Dewsbury-Hall - 7: On loan midfielder from Leicester produced one fine ball into box from free-kick just before break that looked for a second might earn team stunning equaliser. Was still picking out good passes in the last 10 minutes. AFP
Pelly-Ruddock Mpanzu - 6: Not afraid to run at the Chelsea defence but give little opportunity to do so as Luton mainly chased their opponents round the pitch. Werner claimed he should have had second-half penalty after Mpanzu tugged on his arm but the referee and VAR disagreed. Reuters
Harry Cornick - 6: Tough chance after 20 minutes that attacker could only head high and wide. Saw another header from Dewsbury-Hall cross just before half-time fly straight at Kepa. Denied his moment of glory by brilliant Kepa stop that stopped him levelling the scores on the hour. PA
SUBS: Dan Potts - (On for Rea 46’) 6: Son of former West Ham stalwart Steve, made decent impact after coming on. Getty
Luke Berry – (On for Tunnicliffe 61’) 5: Threw himself into battle. AP
Kazenga LuaLua – (On for Bree 61’) 6: Gave Luton a little more attacking impetus after coming on. AFP
James Collins - (On for Cornick 60’) 5: Top scorer was left on the bench and couldn't add to his season's tally after coming on. AP
George Moncur – (On for Naismith 75’) 6: Son of another former West Ham player, in John. Almost scored with first touch, curling shot just wide. Reuters
