Arsenal's lead at the top of the Premier League is up to five points after beating 10-man Chelsea 2-1.
All three goals in the match came from corners, while their opponents had Pedro Neto sent off.
Manchester United are third after a 2-1 victory over Crystal Palace.
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Tottenham lost again, going down 2-1 at Fulham to remain winless in the top flight this year.
Fellow strugglers Nottingham Forest are two points behind Spurs after a 2-1 defeat at Brighton.
