Thibaut Courtois admits the player let down Chelsea last night in Rome.
Chelsea were thumped 3-0 by Champions League opponents Roma in the heaviest defeat of manager Antonio Conte's time in charge.
Afterwards, Courtois conceded they'd left a "bad image" of themselves in Italy, but urged his teammates to show a reaction by beating Manchester United at Stamford Bridge this weekend.
He told BT Sport: "We have to fight back on Sunday against Manchester United.
"Sometimes last season I had nothing to do in a game, sometimes I'd have one save to make. We have to react on Sunday as today was a bad image of ourselves."