Manchester City are on an incredible 11-game winning streak. If they make it a magnificent 12 today, they will most likely knock one of their rivals out of the title race.
Chelsea would be too far adrift to catch up if they lose. Even a draw wouldn't do much good. This is a must-win for Thomas Tuchel.
He beat Pep Guardiola three times towards the end of last season - in the FA Cup semi final, Premier League and in the Champions League final. Tuchel's men must treat today as if it is another final.