Wellalage keeping things tight in the Powerplay. He concedes just two singles in his third over, with Gill playing four dots in a row.
Rohit targets off-spinner Dananjaya sweeping the first ball over square leg for a four.
The India captain slog sweeps the next ball over midwicket for a six to race to his fifty from 33 balls, having hit seven fours and three sixes.
A single each to the two batters to get 12 from the over as India race to 71 for no loss in 10 overs.