Albion hit the woodwork five times and had a penalty controversial overturned as Graham Potter's men tasted defeat. Scroll down and click through to see how each Albion player rated.
9. Leandro Trossard 8/10
What did Trossard do to deserve such bad luck today? Played very well and smacked the woodwork three times. Another day and he would have been celebrating a hat-trick. Booked for a foul on Luke Shaw that led to United's goal.
10. Aaron Connolly 7/10
Was a pest all afternoon for the United defence. Thought he'd won his team a penalty when he collided with Paul Pogba in the second half but the decision was overturned by VAR
11. Neal Maupay 6/10
Fired home a cheeky first half penalty but the conceded a late penalty at the death when he led with his arm in an attempt in defend a late corner. Really tough on the Frenchman who has been a late hero so many times previously for Albion
12. Pascal Gross 6/10
Kept Brighton pushing forward after replacing Lallana on 75 minutes