Chelsea are now one victory away from winning the Premier League title after they came from behind to defeat Leicester.
Jose Mourinho's side can now clinch the league against Crystal Palace on Sunday and claim their first crown since 2010.
They are 13 points clear of Manchester City and Arsenal with just four games left, although the Gunners have a match in hand.
Didier Drogba, John Terry and Ramires scored second half goals to rescue the visitors after disciplined Leicester had shocked them when Marc Albrighton's first goal for the club gave the hosts a deserved lead.