Ellis Simms stunned Chelsea with a late leveller as the striker's first Premier League goal gave Everton a dramatic 2-2 draw at Stamford Bridge.
Joao Felix had opened the scoring with his second goal in the competition since arriving at Stamford Bridge in January, with Chelsea looking good to brush off opponents who had offered very little going forward.
Everton surprisingly got level when Abdoulaye Doucoure nodded in from a corner, but a penalty from Kai Havertz restored Chelsea's lead.
A home win looked all but assured, yet Everton grabbed an 89th-minute equaliser when substitute Simms strode through and beat Kepa Arrizabalaga, halting Chelsea's three-game winning run.