Left-arm wrist spinner Kuldeep Yadav starred with an impressive four-wicket spell as he set up Kolkata Knight Riders to a comfortable six-wicket win over Rajasthan Royals in their Indian Premier League match on Tuesday. Kuldeep (4/20) flummoxed Rajasthan Royals batsmen with his wrist spin. KKR chased down the small target with two overs to spare.