London: Cristiano Ronaldo may regret his decision to return to Manchester United, according to former Dutch and Milan legend Ruud Gullit who also says the club is still 'living in the past'.Ronaldo returned to United in 2021 from Juventus scoring 24 goals in 38 games and all games for the Red Devils.

However, despite the presence of the five-time Ballon d'Or winner, United did not win any trophies and were knocked out of the last 16 of the Champions League at the hands of Atletico Madrid and finished sixth in the Premier League.

Ronaldo has reportedly expressed his desire to leave Old Trafford as they no longer compete in the Champions League but United have shown no sign of allowing the Portugal international to move.Gullit said he believed the 37-year-old was looking forward to showing his best at the World Cup in Qatar later this year but he may regret his decision to return to United.

"Ronaldo is with Portugal, can he do it? I think he can't wait to show the world how great he is," said Gullit.

"That's how I feel. This guy has unbelievable mental strength.

"He didn't say it, but I think he regrets that he went back to United because of the team there. I think he hoped for better so he wanted to show all the critics about him. I think he's on a mission.

Gullit also gave advice to Erik ten Hag. His compatriot from the Netherlands who took over as United manager last season.

Ten Heg didn't get off to the best of starts as his new side lost 2-1 at home to Brighton in their opening game of the Premier League campaign last week.

"Ten Hag, I think he's a good coach but if you come with a Dutch mentality just to come to England, it's difficult," he said.

"You have to adjust yourself and you have to understand that you don't win games with just football. You also need power. You need technique. You need stamina and the right mentality.