"We had started badly, losing three opening games but with Gayle coming in and his opening partnerships with (Tillakaratne) Dilshan have been able to put pressure on the opposition. Gayle has been in tremendous and has bowled well too," said Vettori at the match-eve press conference.
Gayle had destroyed rival bowling attacks with utter disdain with his power-hitting on more than one occasion in the tournament. He has helped the team post big scores.
But Vettori disagreed that has shielded the bowlers. "We were out for 120 and the bowlers were tested in that match. In fact, they are tested in every match because of shorter boundaries and flat wickets."
Defending Indian pace spearhead Zaheer Khan, whose performance has been below par in the IPL 4 so far, the Bangalore skipper said "he bowls economically in the last overs".
"He is a key bowler for us and swung the match for us against Pune Warriors. He bowls economically in the last overs and he and I bear the brunt of the attack."
On his team''s chances of reaching play-offs, Vettori said RCB could reach the knock-out stage but need to improve their fielding.
"With four games remaining, three victories can push us to top two. The current form is satisfying but need to improve on fielding.
"It was fielding which had cost us few initial matches but with batting and bowling coming good the confidence has trickled down to fielding too, which has improved," said Vettori.
"It is an important match and we need to win against Rajasthan Royals to consolidate our position," said Vettori.