Manchester United’s summer business appeared to be done when they recruited Jadon Sancho and Raphael Varane, from Borussia Dortmund and Real Madrid respectively.
But, when it became apparent Ronaldo could end up at Manchester City, the Red Devils decided to take action.
United brought the veteran back to Old Trafford, believing his return could help them challenge the likes of Manchester City and Liverpool for the Premier League table.
Yet while Ronaldo notched an impressive 24 goals across all competitions, The Times say Solskjaer regretted bringing the 37-year-old back.
A source close to the club says the Norwegian believed Ronaldo ‘did not fit’ with what he wanted to achieve.
United had been building a young, attacking, high-octane team at the time of the former Real Madrid and Juventus star’s second coming.
Man Utd news: Ole Gunnar Solskjaer regrets bringing Cristiano Ronaldo back (Image: GETTY)
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Man Utd news: Ole Gunnar Solskjaer felt Cristiano Ronaldo didn't suit his team (Image: GETTY)
"I hope we have success, of course, because, if you have success, all of Manchester is going to have success as well. I wish him the best.
"We are happy and excited, not only as players, but the supporters as well.
"I wish him the best and let's believe that, next year, we are going to win trophies."
Jamie Carragher, however, thinks Ten Hag should offload Ronaldo despite the fact he guarantees goals.
"I'm convinced [Ten Hag] has got to do it with Ronaldo. I'm convinced,” he said.
“Whether he's allowed to or not, and I've said this consistently through this season, that was not a good signing.
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Man Utd news: Cristiano Ronaldo will play under Erik ten Hag next season (Image: GETTY)
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“Cristiano Ronaldo is one of the greatest players of all time, and I'm seen as the guy that's criticising Ronaldo.
"Ronaldo's a miles better player than I was; I couldn't even lace his boots, obviously. But I'm not saying that to be disrespectful to him - he's amazing.
“Ronaldo has never played in a team this bad. He's always played for great teams. His attitude of trying to be the main man, getting the goals, driving people on; when you're in a great team, they're seen as positives.
"When you're not playing for a great team, it can be seen as a negative, and I think it has been a negative this season.
“Man United can't go into next season with a forward who's going to be 38. Even if he does score goals, that's not right for Man United - one of the biggest clubs in the world."