Sunderland defender Papy Djilobodji claims that the Black Cats can pull off a surprise on Wednesday night and defeat Chelsea at the Stadium of Light.
Djilobodji was signed by the Blues last summer before joining David Moyes' side in an £8million move during the summer.
Despite Chelsea sitting on top of the table with Diego Costa in top form with 12 goals, Djillbodji feels the Wearside club can cause an upset.
He said: "I have good memories of being at Chelsea.
"It's a game that we can win. They are having a good season and I know it will be difficult against Diego Costa."