Sent in to bat, Suryakumar Yadav hit a 43-ball 73 , while Ryan Rickelton (25), Will Jacks (21), Tilak Varma (27) and Naman Dhir (24 not out) chipped in with useful contributions as MI posted a 180 for five.
In reply, DC crumbled to 121 in 18.2 overs with Sameer Rizvi top-scoring with a 35-ball 39.
Brief Scores: Mumbai Indians: 180 for five in 20 overs (Suryakumar Yadav 73 not out; Mukesh Kumar 2/48).
Delhi Capitals: 121 allout in 18.2 overs (Sameer Rizvi 39; Mitchell Santner 3/11, Jasprit Bumrah 3/12) PTI ATK BS BS