Sheffield United manager Chris Wilder has hailed Millwall’s transfer business.

The Lions, who were one of the Championship’s lowest spenders last summer, occupy the final play-off spot with three games to go.

Neil Harris’ men extended their remarkable unbeaten league run to 17 games after drawing with top-six rivals Sheffield United on Saturday.

Wilder said: “You've not gone on that run without having something about you and we knew that.

“They were playing with a lot of confidence which the run brings and they're a tough team to beat. They get a lot of people behind the ball.

“Going the other way, the front two are a real good pair and they've got some good players.

“They've recruited well and they're playing with a freedom and a confidence, so we always knew it was going to be a real difficult game.”