Robin Uthappa smashed his way to the third fastest half century of the season as Kolkata Knight Riders notched up a comfortable six-wicket victory over Kings XI Punjab in the Indian Premier League. Put into bat, Kings XI Punjab were restricted to 138 for eight in the stipulated 20 overs at the Punjab Cricket Association IS Bindra Stadium. Led by Uthappa's blazing knock of 53 off 28 balls, the visitors chased down the target of 139 with 17 balls to spare. KKR skipper Gautam Gambhir continued to lead the team well, scoring 34 off as many deliveries. Uthappa reached his 50 off 24 balls, before leg-spinner Pradeep Sahu had him trapped in front of wicket to end a fluent opening wicket partnership of 82 runs in just under nine overs. The wicketkeeper-batsman, who had held catches and whose fastest IPL fifty came off 19 balls in 2010 when he played for Royal Challengers Bangalore, tonight struck nine boundaries during his breezy knock.