Jordan Ayew's deflected equaliser earned Crystal Palace a point at home against Arsenal, who had goalscorer Pierre-Emerick Aubameyang sent off by the video assistant referee (VAR).
Captain Aubameyang had put his side ahead with a well-worked team goal as Mikel Arteta's side dominated the first half.
But Ayew brought Palace level after the break, his goal-bound effort leaving Arsenal goalkeeper Bernd Leno with little chance after bouncing off David Luiz.
Aubameyang was then sent off following a lunging tackle which caught Max Meyer on the left ankle, VAR overturning the initial yellow card he was awarded by referee Paul Tierney.
This fixture had heralded 28 goals in the previous seven meetings between the two sides but little could separate them this time around, though both James Tomkins and Nicolas Pepe went close to winners for their respective teams.
The Eagles could consider themselves lucky to end the match with 11 players with Tomkins narrowly avoiding a red card after a late challenge on Gabriel Martinelli, in what was a feisty first London derby of 2020.
Arsenal manager Arteta - who was not even born when Palace boss Roy Hodgson started his managerial career - remains without an away win in the league since taking over as manager on 20 December.
Palace, meanwhile, remain ninth in the Premier League table, one place above the Gunners.