The ex-Manchester City man scored one before providing the assist for the winner as Mauricio Pochettino's side eventually overcame the 10-man Foxes
Chelsea's hopes of ending the season with some silverware remain alive, but they were made to work for their FA Cup semi-final spot by Leicester City, as the Championship high-flyers came back from two goals down before Carney Chukwuemeka and Noni Madueke's stoppage-time strikes settled the quarter-final in the home side's favour.
Mauricio Pochettino's side dominate the first half, and should have been further ahead than 2-0 at the break. Marc Cucurella and Cole Palmer provided close-range finishes at either end of the half, but they sandwiched Raheem Sterling missing two gilt-edged chances to net,, whose errant back-pass flew into the net from around 40 yards out. Former Arsenal youngster Stephy Mavididi then equalised with a superb curling effort from the edge of the box.