Cristiano Ronaldo never breaks his strict diet! Al-Nassr superstar receives HUGE birthday cake from partner Georgina Rodriguez after turning 39 - but only indulges in one small slice

The Portuguese superstar celebrated his 39th birthday with partner Georgina Rodriguez and family but despite the huge cake parked in front of them for photos to mark the occasion, Ronaldo remained admirably committed to the diet that has kept him in magnificent shape as he approaches his 40s.

Posting on Instagram, the five-time Ballon d'Or winner said: "Grateful to spend my 39th birthday the best way possible: with my family and back on the training pitch. Thank you all for the warm messages!"

Ronaldo's commitment to keeping himself in shape is a major factor in the remarkable longevity of his career to date. This summer's European Championship will see him take part in his 11th major tournament and take his international appearances to well over 200 caps.

A muscle injury kept Ronaldo out of several mid-season friendlies, including the ill-fated 'Last Dance' with Lionel Messi. But his message that he's back on the training ground will be music to the ears of Al-Nassr fans, with their season restarting with a huge Asian Champions League last-16 clash with Pro League rivals Al-Fayha next week.