Substitute Kieran Gibbs rescued a point for Arsenal in a pulsating north London derby against Tottenham.
Spurs dominated for long periods and took a deserved first-half lead when Harry Kane broke clear and slotted in. However, Arsenal slowly took control in the second half and equalised when Mesut Ozil provided a deep cross for Gibbs to bundle past Hugo Lloris.
Arsenal are level on points with Manchester City at the top of the Premier League, while Spurs lie fifth.
Over at Anfield, Jurgen Klopp suffered his first loss as Liverpool manager, seeing his side beaten by Crystal Palace.
Defender Scott Dann nodded in the winner nine minutes from time after the ball bounced up to him in the area.
The visitors had taken the lead through winger Yannick Bolasie, who smashed home from inside the box after the Reds failed to clear the ball. Philippe Coutinho curled in Liverpool’s goal three minutes before half-time following Adam Lallana’s flicked pass.
Bottom club Aston Villa held leaders Manchester City to a goalless draw in Remi Garde’s first game as manager.
Displaying a new-found defensive solidity, the hosts restricted City well although Raheem Sterling should have scored with a close-range header.
Fernando saw a late header hit the bar for the visitors, while substitute Fabian Delph’s low shot rolled just wide. Villa were less effective going forward and did not manage a shot on target.