Rishabh Pant
Though Karthik has been terrific behind the stumps, he has been terrible with the bat. He has been at sea against the moving ball. Rishabh Pant needs to be drafted in place of Karthik.
Pant is a fearless young cricketer who tonks the cricket ball really hard. He already had a feel of the English conditions as he(like Karun Nair) was part of the India A team which toured England recently.