Cristiano Ronaldo is to undergo 'urgent tests' to discover the extent of the muscle injury he picked up during Al Nassr's 3-1 victory over Al-Fayha on Saturday. The 41-year-old, who missed a penalty during the match, was forced off with less than 10 minutes to go after signalling to the bench that he had picked up a problem. Ronaldo was visibly struggling as he made his way off the pitch, and he was seen with an ice pack on his leg while sitting out the remainder of the game. The injury has left Portugal fans sweating over the fitness of their main man, with the World Cup now just three months away. The summer showpiece is expected to be Ronaldo's record sixth and final World Cup, and he will be hoping his latest injury setback is nothing too serious. Al-Nassr manager Jorge Jesus said: 'Ronaldo suffered muscle fatigue and the medical staff will urgently perform the necessary tests to determine his condition.' #ronaldo #cr7 #alnassr #portgual #worldcup