Christian Pulisic has warned the strength of Chelsea's mentality is about to be tested in the wake of their 5-2 defeat to West Brom on Saturday.
Pulisic gave the Blues the lead in the first half of the clash at Stamford Bridge, but the relegation-threatened visitors fought back to secure the three points.
It is Chelsea's first defeat in any competition since Leicester got the better of them in January 19 and Pulisic feels his team need a strong response as they prepare for some high-profile matches.