Bruno Fernandes, 6 - On for Van de Beek 77. Brightened United up and his form will be vital if United are to get going again. Getty
MANCHESTER UNITED RATINGS: Dean Henderson, 7 - First United start warranted by his talent and desire, according to his boss. Decent distribution. Super reaction save at near post after 80 mins. Clean sheet. Reuters
Aaron Wan-Bissaka, 6 - Glimpses of improvement as he attacks, but needs to get his form back. AP
Harry Maguire, 6 - Captain and the only player who started in Saturday’s dismal defeat to Palace. Looked more comfortable with Eric Bailly than Victor Lindelof. AP
Eric Bailly, 7 - Weak header set up early Luton attack, but otherwise encouraging display which should put him in frame to start after United’s woeful defensive display at weekend. His speed is needed in that team, his fitness too. AFP
Brandon Williams, 5. Knew what he was doing to win penalty and booked for a heavy challenge. Energetic but gave ball away too much. EPA
Nemanja Matic, 6 - Distributes well and brings balance. Hammered a shot with his left foot on 63 minutes. Reuters
Fred, 6 - More passes than anyone on the pitch. Steady, unspectacular and good for the Brazilian to get 90 minutes. Getty
Juan Mata, 7 - Two early shots, nice touches and comfortable in converting penalty at a time when United needed it. Left foot, bottom corner. Made eight crosses – no other player managed more than two. Best player on the pitch. Getty
Donny van de Beek, 6 - Moves well off the ball but saw little of it. Only Ighalo, playing ahead of him, made fewer than his 21 passes in 77 minutes when both went off, but he was involved in move which led to penalty. PA
Jesse Lingard, 6 - Bright start as Luton sat deep and allowed United to have the ball. Came close to scoring United’s second but blocked by former teammate Tunnicliffe. Carries the ball forward, came close late on, but still needs to assist and score. Reuters
Odion Ighalo, 4 - Struggled to find his position as his team tried to break Luton down. Slow and minimal impact and did little to show he’s worthy of more minutes. Getty
SUBS: Mason Greenwood, 7 - On for Mata after 77. Set up Rashford for United’s second. Lively with both feet and got third, deceiving Luton’s defence with a double stepover before finishing. EPA
Marcus Rashford, 6 - On for Ighalo 77. Scored United’s second after neat first touch created him space. Needed it. Getty
Bruno Fernandes, 6 - On for Van de Beek 77. Brightened United up and his form will be vital if United are to get going again. Getty
MANCHESTER UNITED RATINGS: Dean Henderson, 7 - First United start warranted by his talent and desire, according to his boss. Decent distribution. Super reaction save at near post after 80 mins. Clean sheet. Reuters
Aaron Wan-Bissaka, 6 - Glimpses of improvement as he attacks, but needs to get his form back. AP
Harry Maguire, 6 - Captain and the only player who started in Saturday’s dismal defeat to Palace. Looked more comfortable with Eric Bailly than Victor Lindelof. AP
Eric Bailly, 7 - Weak header set up early Luton attack, but otherwise encouraging display which should put him in frame to start after United’s woeful defensive display at weekend. His speed is needed in that team, his fitness too. AFP
Brandon Williams, 5. Knew what he was doing to win penalty and booked for a heavy challenge. Energetic but gave ball away too much. EPA
Nemanja Matic, 6 - Distributes well and brings balance. Hammered a shot with his left foot on 63 minutes. Reuters
Fred, 6 - More passes than anyone on the pitch. Steady, unspectacular and good for the Brazilian to get 90 minutes. Getty
Juan Mata, 7 - Two early shots, nice touches and comfortable in converting penalty at a time when United needed it. Left foot, bottom corner. Made eight crosses – no other player managed more than two. Best player on the pitch. Getty
Donny van de Beek, 6 - Moves well off the ball but saw little of it. Only Ighalo, playing ahead of him, made fewer than his 21 passes in 77 minutes when both went off, but he was involved in move which led to penalty. PA
Jesse Lingard, 6 - Bright start as Luton sat deep and allowed United to have the ball. Came close to scoring United’s second but blocked by former teammate Tunnicliffe. Carries the ball forward, came close late on, but still needs to assist and score. Reuters
Odion Ighalo, 4 - Struggled to find his position as his team tried to break Luton down. Slow and minimal impact and did little to show he’s worthy of more minutes. Getty
SUBS: Mason Greenwood, 7 - On for Mata after 77. Set up Rashford for United’s second. Lively with both feet and got third, deceiving Luton’s defence with a double stepover before finishing. EPA
Marcus Rashford, 6 - On for Ighalo 77. Scored United’s second after neat first touch created him space. Needed it. Getty
Bruno Fernandes, 6 - On for Van de Beek 77. Brightened United up and his form will be vital if United are to get going again. Getty