Alan Hutton insists that having the transfer window open during the season must be an “absolute nightmare” for Celtic manager Neil Lennon.

The former Rangers and Scotland defender, speaking exclusively to Football Insider assistant editor Russell Edge, admits he would be tearing his hair out as the Hoops boss if he had to deal with the speculation surrounding Kristoffer Ajer.

As quoted by the Daily Record, Lennon confirmed that there had been no concrete offers for the centre-back despite reports suggesting a £15million bid from AC Milan was in the offing.

As revealed by Football Insider at the start of September, Parkhead chiefs were convinced the 22-year-old was engineering a move away over the international break.

Ajer, who Celtic value at around £20million, is understood to be one of the wantaway players Lennon publicly chastised last month for their attitude behind the scenes.

Hutton admits he feels for Lennon amid all the uncertainty and suggests the window should be closed before the Premiership season gets underway.

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Hutton told Football Insider: “I think this is the problem, when the transfer window’s open and the season’s playing, it’s not ideal. If I was a manager, honestly, I’d be tearing my hair out.

“It would be so annoying, can you imagine? You’re trying to pick your team and get it ready for games, important games and then one of your star players has seen: ‘£25million bid has been turned down by the club.’ That player is now raging.

“He’s thinking: ‘I want a move, I want to go to AC Milan and play at a high level,’ so now his head’s turned and he’s not the same player he was before.

“It must be an absolute nightmare and that is the problem the window being open when the season started.

“I understand that everything that’s going has impacted the way transfers work but it’s something that probably needs to be looked at as a bit of a nightmare.” 

In other Celtic news, West Brom and Southampton are set to go head-to-head for a Parkhead star.