• Mourinho: 'real Ronaldo' is the former Brazilian striker • Attacker won't 'speak about people who say bad things'

A spat between José Mourinho and Cristiano Ronaldo has spiced up Wednesday's friendly between Real Madrid and Chelsea in Miami.

Mourinho, who moved from the Bernabéu to Stamford Bridge in June, belittled his Portuguese compatriot in an interview with ESPN, by declaring that "the real Ronaldo" was the former Brazil striker, with whom he worked during his period as a translator and assistant coach at Barcelona between 1996 and 1997.

Ronaldo responded by telling a news conference in Los Angeles: "I prefer to remember the good things from coaches. I don't spit on the plate from which I eat and I don't speak about people who say bad things about me.

"We are going to face Chelsea, not their coach. It is another warm-up game and we hope to win it so we can start La Liga in the best manner possible."

Mourinho added further intrigue to the meeting with his former employers by stating: "Madrid is politics. Madrid is not about football, Madrid is not about sport."

Madrid have won all their warm-up games under their new coach, Carlo Ancelotti, and take on Chelsea in Miami with Ronaldo having played in a newer more advanced striker role on the pitch.

"The coach has different strategies and different positions for everyone," the 28-year-old said. "It is good for me to try to play in different positions and I am comfortable with it. We'll see where I end up playing during the season."

Two of the hottest topics surrounding Madrid in the run up to the new campaign are the club's multimillion-euro attempt to prise Gareth Bale from the clutches of Tottenham Hotspur and talks over a contract extension for Ronaldo.

Ronaldo has refused to confirm reports in Spain that he has agreed a new five-year contract. The Spanish newspaper Marca has said he has secured his future at the Bernabéu until 2018, increasing his salary to €17m (£14.8m) a year after tax and negotiating a new arrangement over the sale of his image rights.

Ronaldo has two years left to run on his contract at Madrid, who paid a world record £80m fee to sign him from Manchester United in 2009, but he has courted speculation over his future by revealing that he misses playing in the Premier League. It has led to him being linked with a return to Old Trafford.

Ronaldo told a press conference on Monday: "I am happy here and all I want to do is train and prepare well. The contract renewal hasn't been resolved yet but I shouldn't talk about it because it isn't the right moment."

The Madrid president, Florentino Pérez, has said he wants Ronaldo to retire at the Bernabéu.

The forward was also asked about Bale, for whom Madrid would have to pay at least £86m – a fee that eclipses the one they paid for Ronaldo.

"It's not my place to talk about new players," he said. "It's not my place either to talk about the numbers that are being mentioned for his transfer. I have my opinion but I am not going to say in front of the cameras."