Arsenal maintained their pursuit of a first Premier League title for 20 years as they moved top of the table with an impressive away victory over Brighton.
Mikel Arteta's side edged one point ahead of title rivals Liverpool, who face Manchester United at Old Trafford on Sunday, and Manchester City after the reigning champions beat Crystal Palace 4-2 earlier on Saturday.
The returning Bukayo Saka, absent for Wednesday's 2-0 victory over Luton with a minor injury, kept his composure under pressure to slam in a first-half penalty awarded for Tariq Lamptey's foul on Gabriel Jesus.