Delhi's regular skipper Virender Sehwag, who missed the previous two matches, has come back for the important match. He replaced Unmukt Chand.
In the second change, Kiwi batsman Ross Taylor has returned in place of Andre Russell.
Kolkata have fielded an unchanged side.
The winner of today's match will qualify for Sunday's title clash.
The loser of today's match will clash with winner of the Eliminator between Mumbai Indians and Chennai Super Kings.
Teams:
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Delhi Daredevils: Virender Sehwag (C), David Warner, Mahela Jayawardene, Nanam Ojha, Ross Taylor, Y Venugopal Rao, Irfan Pathan, Pawan Negi, Varun Aaron, Morne Morkel and Unmukt Yadav.
Kolkata Knight Riders: Gautam Gambhir (C), Brendon McCullum, Jacques Kallis, Manoj Tiwary, Shakib Al Hasan, Yusuf Pathan, Debabrata Das, Rajat Bhatia, Iqbal Abdulla, Sunil Narine and L Balaji.