Manuel Pellegrini opted to make wholesale changes to his side including five youth players in his starting line-up with Aleix Garcia and Manu Garcia featuring as well as Kelechi Iheanacho.
The Blues took the lead on 35 minutes Diego Costa heading home Eden Hazard’s cross but their lead was short-lived, David Faupala bundling home an equaliser less than two minutes later.
However, Chelsea came out for the second half in determined fashion, Willian finishing off a quick counter to put them 2-1 up before Gary Cahill lashed home a third after City had failed to clear a Willian corner.
Hazard then capped a much-improved display by firing home a free-kick while Oscar saw a penalty saved before substitute Bertrand Traore grabbed a fifth late on with a looping header that sneaked in at the far post.
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