Enzo Maresca slammed his Chelsea flops lack of consistency after Sunderland snatched a shock 2-1 win at Stamford Bridge on Saturday.
Marescas side were rocked by Sunderland substitute Chemsdine Talbi, whose stoppage-time goal shattered the Blues four-match winning run in all competitions.
It was a stark contrast to Chelseas last home Premier League game, when Estevao Willian scored at the death to beat Premier League champions Liverpool.