In the first Qualifier match of the IPL tournament at the Wankhede Stadium in Mumbai, Mumbai Indians have opted to field after winning the toss against Rising Pune Supergiant.In the Eliminator fixture tomorrow, Kolkata Knight Riders will clash with defending champions Sunrisers Hyderabad in Bengaluru. The winner of that match will face today's loser on Friday in the second Qualifier, which will decide the second entrant of the final.