Real Madrid manager Carlo Ancelotti has rubbished recent suggestions claiming Cristiano Ronaldo may return to Manchester United.

The Portuguese star's future at the Santiago Bernabeu has been under scrutiny after Ronaldo himself questioned the departures of both Angel Di Maria to Manchester United and Xabi Alonso to Bayern Munich.

Ronaldo also suggested he may finish his playing career at his former club, while United manager Louis van Gaal fuelled rumours claiming the Red Devils would be open to re-signing him after selling him to Real Madrid in 2009 for £80m.

"It is possible [that United will buy Ronaldo]; what I said with [Radamel] Falcao, players like Ronaldo give a lot extra to our selection or to a team, but I don't think Real Madrid shall sell him."

Recent reports claimed the Premier League giants will have to pay around £150m to convince Real Madrid to part ways with their biggest star but Ancelotti said the rumours were "nonsense".

"These are words without meaning," Ancelotti told a press conference when asked if he could imagine a Real Madrid team without Ronaldo.

"He is very happy here and all of Real Madrid are delighted with Ronaldo. These [suggestions] are nonsense.

"Right now, there is no doubt he is the best player [in the] world. I have played against him when I was [managing] Milan and he was at United and I think stopping him is not easy.

"We are lucky to have him in on our team. He plays as a leader. We have to have him physically and mentally fit because he is a player who gives titles."

The ex-United star has had a strong start to the season, scoring nine goals in four La Liga games.

Meanwhile, earlier this week, Ronaldo also tried to play down the United rumours, claiming he was happy in the Spanish capital.

"It is all speculation, speaking about my future... My future is Madrid," he said. "I am happy. The season is going well and I am not talking about my future, it does not make sense."