Cristiano Ronaldo shows off impressive abs and ripped physique for CR7 underwear campaign.more photos below

Football star, Cristiano Ronaldo stripped down to his pants for his CR7 sexiest underwear campaign.

The Real Madrid striker who is set to become a dad for the fourth with his girlfriend Georgina Rodriguez who is pregnant with their first baby, showcased his impressive athletic abs when he slipped his muscular body into his CR7 skimpy boxer shorts.

More photos below....