After losing the toss, West Indies had an average start with two wickets for 75 runs. Then a big collapse arrived. The visitors were bundled out for 134 runs in 45.4 overs after being 75 for 1. Kieran Powell top-scored with 42 off 79 with eight boundaries.
Left-arm seamer Wagner scalped career-best seven wickets for 39 runs in 14.4 overs, the fourth-best by a New Zealander. He became the first Blackcaps bowler after Daniel Vettori (7/130 vs Sri Lanka) to take a seven-for at home since 2006.
Debutant Sunil Ambris was hit wicket by Wagner on his very first ball. He became the first ever in the history to be hit wicket on the first ball and the 11th overall on debut.
In reply, New Zealand openers Tom Latham and Jeet Raval put on 65. Latham made 37 off 85 balls with 5 fours. Skipper Kane Williamson missed out as he was sent back for 10-ball 1. Raval (29* off 101) and Ross Taylor (12* off 32*) are unbeaten as the hosts finished the day with 85/2 in 38 overs.
Captain Jason Holder and Kemar Roach are the Caribbean wicket-takers. Miguel Cummins bowled eight overs for only six runs till now. West Indies are leading by 49 runs but New Zealand have eight wickets in hand.
West Indies 134 allout in 45.4 overs (Powell 42, K Brathwaite 24; Wagner 7/39, Boult 2/36)
New Zealand 85/2 in 38 overs (Latham 37, Raval 29*; Holder 1/19, Roach 1/27)
-Ruffin, Correspondent, bdcrictime.com