London derbies are big at the best of times, but as Chelsea face Tottenham at Stamford Bridge many more people have a vested interest.
For Spurs, not winning at Chelsea will hand the Premier League title to Leicester - for the first time in 24 years.
And for Leicester fans, cheering on Chelsea is very unfamiliar territory.
I hate myself for saying this! "Let's go Chelsea" ??? #CHETOT
-- hasteen shah (@EdmArsenal) May 2, 2016
-- Matt Edworthy (@MEdworthy90) May 2, 2016
I guess I have no choice but to support Chelsea tonight.
-- ?Prizzy (@thebxy) May 2, 2016
Can't believe I actually want Chelsea to win a game
-- Daniel McRoberts (@DanMcRoberto) May 2, 2016
Lmao my friend just phoned me & said *I want Chelsea to win,but also preparing a long how shower to cleanse myself after the game is over!*
-- Ms Nakana (@Yeah_Its_Kdee) May 2, 2016
Cheering on Chelsea! Feels weird.
-- MGH (@OfficialMgh) May 2, 2016
It really is a strange, unfamiliar and unsettling feeling this wanting-Chelsea-to-win business
-- Ben McKenna (@benmckenna) May 2, 2016
Cheering for Chelsea. I need a shower.
-- The Ice Man (@BrutalArsenal) May 2, 2016
There were also mixed feelings about this banner.
-- Francesco Rocchi (@RockyFranz) May 2, 2016
Mwa ha ha ha ha. Chelsea fan holding up a sign saying "let's do it for Ranieri." The same Ranieri his club sacked! Beyond parody.
-- Danny Le Maistre (@dannylemaistre) May 2, 2016