The former Aston Villa boss recruited the Portuguese from Benfica and believes that he can show his worth against Antonio Conte's Premier League side
Wolves manager Paul Lambert has backed Helder Costa to be a threat against Chelsea when the teams meet in the FA Cup.
The Championship outfit set up a fifth-round encounter with Antonio Conte's men after overcoming Liverpool in the fourth round.
Having scored in Wolves' third-round victory over Stoke City, Costa was again a key player against Jurgen Klopp's side in the last round, providing two assists as they pulled off an upset at Anfield.