Christian Pulisic urged calm after Chelsea's home thrashing by West Brom.
The Blues were thrashed 5-2 at home by the Baggies on Saturday.
Pulisic said, "It was a tough first half for us.
"We made some simple mistakes we don't normally make. The red card changes everything. To give them credit they played their attacks really well. It's no time to panic. We've been in good form and lost one game.
"We need to be ready for midweek."