Nigeria midfielder Mikel Obi was an unused substitute as Chelsea scored two goals in the final 11 minutes to rescue a 2-2 draw at Newcastle United.
Mikel, who was only recently recalled to the Super Eagles, was not needed as Jose Mourinho made changes in search of comeback goals.
Newcastle were the better team in the first half, and they took a deserved lead three minutes from the break when Daryll Janmaat’s searching ball got the better of Kurt Zouma and Branislav Ivanovic, allowing Perez to volley beyond Chelsea’s Bosnian keeper Asmir Begovic and silence the visiting supporters.
Georginio Wijnaldum got the better of Cesc Fabregas in the area to head home Perez’s corner and double Newcastle’s advantage.
Chelsea fought back and Ramires got them back in the game with a long range shot.
Ramires was also involved in the equaliser as his run deceived goalkeeper Krul for Willian’s freekick to sail in.