But speaking ahead of his first game in charge of the Tangerines away to Partick Thistle on Saturday, new United boss Neilson believes he can get the winger flying again.

He told ArabZone: “I’ve known Billy for a long time. When I went back to Hearts to take the 20s, Billy was there. So I know what type of character he is. He can be sensational on his day.

“But wingers are a wee bit different and they can have 30 minutes where they look unplayable then end up going missing. But I think as Billy has got a bit older he’s got a bit more consistent. He’s figured out how to get himself into a game.

“When I had him before, unless the game came to him, he found it difficult. But watching him recently he looks like he’s figured out how to get himself involved even when it’s not happening for him.

“So I’m pleased to have him and once we can get him fully fit I’m sure he’ll be a big asset.”

Neilson turned down the chance to replace sacked Jags boss Alan Archibald at Thistle as he opted to return to United, where he spent a year as a player.

But he is not surprised to see the Jags struggling after being relegated last term.

He said: “Partick have had a lot of injuries at the start of the season and are kind of similar to Dundee United in that they’ve been missing many of their key players.

“When you don’t have a huge squad and lose two or three players it can make a big difference.

“Am I surprised by their start? Yeah, because they are a team that’s come down from the top league but I’m not surprised by the way things have turned out since the injuries, especially with the pressure that comes after you are relegated. If you don’t win your first 10 games, then pressure mounts.”

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