WEST HAM RATINGS: Alphonse Areola - 6: Came charging out to deny Theo Bongonda with a last-ditch tackle early on. Got away with one after 38 minutes, though, when Paul Onuachu beat him to a cross but headed just wide. Getty
Ben Johnson - 7: Pulled good ball back to Bowen from byline after 26 minutes but teammate could only produce a fresh-air shot. Impressive night up and down West Ham’s right flank and becoming a key player. AFP
Issa Diop - 7: French centre-back took a bit of time to settle into the game as Genk caused some early problems. Headed home via underside of the bar from Cresswell to put West Ham 2-0 up. Brilliant block on Junya Ito shot later in second half. Reuters
Craig Dawson - 7: Couldn’t clear at back post after 10 minutes and ball ended up being nodded into an empty net by Theo Bongonda but offside flag had been raised. Put West Ham into the lead on brink of half-time from a Cresswell corner. AFP
Aaron Cresswell - 8: Up against a tricky opponent in Japan international Ito but still found time to offer Hammers regular outlet going forward down left and set up first two goals with perfect set-piece deliveries. AFP
Tomas Soucek - 7: Good header pushed away by goalkeeper Maarten Vandevoordt. Nice one-two with Bowen but no one in box to turn home his cross. The usual reliable performance from Czech midfielder. AP
Declan Rice - 8: Player at top of his game at the moment. Puppet master pulling the strings from base of midfield, important interceptions and the heartbeat of West Ham’s win. AFP
Nikola Vlasic - 6: Clipped early chance across face of goal that was neither shot nor cross but otherwise struggled to make an impact. Had an opportunity to make it 4-0 but shot was blocked after taking too long to pull trigger. AFP
Manuel Lanzini - 7: Took three defenders out of the game with lovely through-ball to Johnson in first half in move that ended with Bowen missing. Neat and tidy evening from Argentine. AP
Andriy Yarmolenko - 6: Some nice passes, flicks and tricks but execution of final ball not always there. Furious at himself when he smashed left-footed shot high and wide early in second half. AFP
Jarrod Bowen - 7: Leading line with Michail Antonio on sidelines but suffered embarrassing swing and miss 25 minutes in with goal at his mercy. Did find the back of the net with low shot that keeper should have stopped to make it 3-0. Getty
SUBS: Ryan Fredericks – (On for Cresswell 67’) 7: Replaced one of the men of the match but did well after coming one with a few lovely passes to pick out teammates. Reuters
Mark Noble – (On for Rice 67’) 6: Hammers stalwart took over from Rice as captain with game already won. Reuters
Pablo Fornals – (On for Vlasic 83’) N/A. Getty
Said Benrahma – (On for Bowen 83’) N/A. Getty
Daniel Chesters – (On for Lanzini 89’) N/A. Getty
WEST HAM RATINGS: Alphonse Areola - 6: Came charging out to deny Theo Bongonda with a last-ditch tackle early on. Got away with one after 38 minutes, though, when Paul Onuachu beat him to a cross but headed just wide. Getty
Ben Johnson - 7: Pulled good ball back to Bowen from byline after 26 minutes but teammate could only produce a fresh-air shot. Impressive night up and down West Ham’s right flank and becoming a key player. AFP
Issa Diop - 7: French centre-back took a bit of time to settle into the game as Genk caused some early problems. Headed home via underside of the bar from Cresswell to put West Ham 2-0 up. Brilliant block on Junya Ito shot later in second half. Reuters
Craig Dawson - 7: Couldn’t clear at back post after 10 minutes and ball ended up being nodded into an empty net by Theo Bongonda but offside flag had been raised. Put West Ham into the lead on brink of half-time from a Cresswell corner. AFP
Aaron Cresswell - 8: Up against a tricky opponent in Japan international Ito but still found time to offer Hammers regular outlet going forward down left and set up first two goals with perfect set-piece deliveries. AFP
Tomas Soucek - 7: Good header pushed away by goalkeeper Maarten Vandevoordt. Nice one-two with Bowen but no one in box to turn home his cross. The usual reliable performance from Czech midfielder. AP
Declan Rice - 8: Player at top of his game at the moment. Puppet master pulling the strings from base of midfield, important interceptions and the heartbeat of West Ham’s win. AFP
Nikola Vlasic - 6: Clipped early chance across face of goal that was neither shot nor cross but otherwise struggled to make an impact. Had an opportunity to make it 4-0 but shot was blocked after taking too long to pull trigger. AFP
Manuel Lanzini - 7: Took three defenders out of the game with lovely through-ball to Johnson in first half in move that ended with Bowen missing. Neat and tidy evening from Argentine. AP
Andriy Yarmolenko - 6: Some nice passes, flicks and tricks but execution of final ball not always there. Furious at himself when he smashed left-footed shot high and wide early in second half. AFP
Jarrod Bowen - 7: Leading line with Michail Antonio on sidelines but suffered embarrassing swing and miss 25 minutes in with goal at his mercy. Did find the back of the net with low shot that keeper should have stopped to make it 3-0. Getty
SUBS: Ryan Fredericks – (On for Cresswell 67’) 7: Replaced one of the men of the match but did well after coming one with a few lovely passes to pick out teammates. Reuters
Mark Noble – (On for Rice 67’) 6: Hammers stalwart took over from Rice as captain with game already won. Reuters