Paul Warne reacts to Rotherham United's opening-day win at AFC Wimbledon

The Millers in action at Wimbledon. Picture by Jim Brailsford

Having bossed the first half and led 1-0 at the break, the Millers conceded an equaliser after the break and needed a late goal to seal the win.

"We were unplayable at times in the first half," he said. "But I wasn't happy with the second half. We have a lot to work on."

Record buy Freddie Ladapo scored a debut goal to put Rotherham in front and Clark Robertson's low 84th-minute shot was the match-winner following Joe Pigott's 50th-minute leveller.

"I think we should have gone in at the break with a bigger lead," said Warne who praised the backing of the Millers' sold-out away contingent.

“Wimbledon caused us all sorts of problems at the start of the second half.

"It was disappointing conceding from a set-piece. The impetus went towards them. But we still had enough chances to win.

“I’m happy with the victory but there is more to come.

“I’m asking a lot from the lads physically and I’m happy with the bench. I thought the subs had a good positive impact, Wilesy (Ben Wiles) especially.

“They just give us that bit of energy on a hot day on the opening day of the season when everyone was fatiguing."