Couple watch semi-final between Roger Federer and Janko Tipsarevic

Cristiano Ronaldo and Irina Shayk looked to be discussing a rather private matter as they watched tennis this weekend.

Real Madrid footballer Cristiano cupped his hand round his mouth as he leaned in to his Russian model girlfriend, ensuring nobody could see what he was saying.

In-between their whispered chats, the pair watched Swiss tennis star Roger Federer beat Bosnian Janko Tipsarevic at the Mutua Madrid Open.

Cristiano, who’s dad to Cristiano Jr, 1, has been dating Irina, 26, for two years.

He recently revealed that he hopes he’ll one day settle down like husband and father-of-four David Beckham, 37.

‘I want to be a family man,’ admits Cristiano, 27.

‘Like David Beckham. I’d like a little girl like him, too.’

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Esme Riley