North Sound (Antigua): India's pace bowling mainstay Jasprit Bumrah says he is always evolving to polish his craft, the latest addition to which is the outswinger that he wasn't particularly confident of until last year.

Bumrah recently became the fastest Indian pacer to 50 Test wickets, during his six-wicket match haul against the West Indies in the first Test here, which India won by 318 runs on Sunday.