Juventus Star Cristiano Ronaldo was left red-faced after he failed to catch a ball at the ATP Finals in London.

Ronaldo was with girlfriend Georgina Rodriguez and eldest son Cristiano Jr for Novak Djokovic’s clash with American John Isner last night.

Djokovic thrashed Isner in just 73 minutes winning 6-4 6-3 under the watchful eye of Ronaldo.

The Juve ace had jetted straight to London after scoring in the Italian club’s win over AC Milan over the weekend.

Ronaldo enjoyed front-row seats to watch the action at the O2 Arena.

And at the event last night, Ronaldo attempted to catch a rogue shot as it flew towards him.

However, the Portugal superstar was all fingers and thumbs as he dropped the catch before the ball bounced girlfriend Rodriguez on the head.

And to save his father from further embarrassment, Cristiano Jr duly picked up the ball and threw it back onto the court.

The trio were able to share a laugh before continuing to watch the action.