Paul Pogba and Marcus Rashford continued their magnificent recent form with a goal each as Manchester United beat Brighton & Hove Albion 2-1.
Pogba scored his fifth goal in three home PL matches when he converted a 27th-minute penalty after being fouled by Gaetan Bong.
Rashford made it 2-0 with a brilliant piece of skill and a finish into the top-right corner from an acute angle three minutes before half-time.
Pascal Gross pulled a goal back in the 73rd minute when he fired in off the crossbar, following Davy Propper's cross.
But a sixth PL win out of six under Ole Gunnar Solskjaer means United move above Arsenal into fifth position and three points behind fourth-placed Chelsea, ahead of the two London sides meeting at Emirates Stadium in Saturday's late kick-off.
See: Man Utd report | Brighton report
Next fixtures
Man Utd: 29 Jan v Burnley (H)
Brighton: 29 Jan v Fulham (A)