Ole Gunnar Solskjaer bemoaned Manchester United's inability to do things the easy way after beating bottom-placed Sheffield United to secure a sixth straight Premier League comeback win on the road.

The Red Devils continued their 100 per cent away league away record at the beleaguered Blades, where they found themselves in the all too familiar position of needing to bounce back.

David McGoldrick opened the scoring inside five minutes after Dean Henderson - the former Blades loanee brought in for David De Gea - was caught in possession, but Marcus Rashford and Anthony Martial turned things around.

Rashford ended a superb team move to extend Manchester United's lead early in the second half, but they had to dig deep at the end as McGoldrick reduced the deficit before Henderson denied substitute Lys Mousset to secure a 3-2 win.

"From when I was playing, we seemed never to make it easy for ourselves," 1999 treble hero and Manchester United boss Solskjaer said.

"Of course the start was so sloppy, slow again and I'm very surprised about that because we'd spoken about it, showed videos. We knew exactly what was going to happen and it happened.

"We jogged around the pitch and that's not good enough. But then the character is fantastic by every single one of us. They just started playing.

"It's a test for Dean, of course making a mistake like this, and he passed it with flying colours because he never went chasing the game, didn't look for jobs. He just did what he had to do.

"I don't have any frustrations at the moment. We got three points from a difficult game at a difficult place.

"Of course it could have been more comfortable at the end, but you don't expect it to be comfortable.

"The goals we scored were excellent and once in a while you have to just accept that the opposition have got weapons and armoury that can harm you and Sheffield United certainly have."

Solskjaer certainly has the firepower to make a difference, with goalscorer Rashford and Martial complemented in the front three by teenage star Mason Greenwood.

"I don't think it's just a key to get them on the pitch - it's a key to get them on the pitch playing well and performing," Solskjaer said.

"They've all played and I said before the game today that we need them to kick on, start scoring goals.

"We've done ok without them really firing and tonight they showed their capabilities. Now we need that consistency. We need it again and again, so very happy with all three of them."