Manchester United celeb fan Usain Bolt says they're asking too much of Cristiano Ronaldo.

Bolt fears United lack the winning mentality that made the club what it is today, amid growing pressure on Ole Gunnar Solskjaer.

Ronaldo has come to his manager's rescue several times this season and the Olympics legend believes there is an over reliance on the Portuguese striker. The Red Devils have not won a match that Ronaldo has not scored in since he joined.

“We are going to struggle. Cristiano [Ronaldo] has saved us every game," Bolt told The National. “One guy has to do all that work.

“We have not played good football in so long. It is so relaxed. We pass so slowly. When Alex Ferguson was manager, we had to win because he would demand you win."