Chelsea's FA Cup defeat to Manchester City was the Blues' heaviest loss of the season. It came with a rotated side, albeit against another rotated side, but Pep Guardiola's men did not have to leave second gear to take advantage of Chelsea mistakes.
Graham Potter's team were unable to break through City's press often and errors presented themselves as Riyad Mahrez first dispatched a free-kick before Chelsea handed their opponents two penalties either side of a well-worked goal from Phil Foden.
Kalidou Koulibaly was responsible for a foul on Phil Foden, which allowed Mahrez to cap off the victory from the spot. The Senegal international's form has come under the spotlight, and partnered with 19-year-old Bashir Humphreys while Thiago Silva was rested, the onus was on the 31-year-old to take command.
