Tokyo: Cristiano Ronaldo was diagnosed on Sunday with a viral infection and will miss Al Nassr's Asian Champions League opener this week at Iraq's Al Shorta. The Portuguese veteran is targeting Asia's top club crown to add to his long list of achievements when the competition kicks off on Monday. "Al Nassr captain Cristiano Ronaldo was not feeling well today and was diagnosed with a viral infection," said a club statement posted on social media platform X on Sunday.

"The team's doctor confirmed he needs to rest and stay at home. As a result he will not be travelling with the team to Iraq today. We wish our captain a speedy recovery.

" The former Real Madrid and Manchester United forward saw his first attempt with the Saudi side Al Nassr end in a quarter-final penalty shootout defeat to eventual champions Al Ain earlier this year. Despite the absence of the 39-year-old Ronaldo for Monday's opening encounter in Bagdad, Al Hilal are still able to call on Sadio Mane, Aymeric Laporte and Marcelo Brozovic. The defending champions, Al Ain, are from the United Arab Emirates and were coached by Argentina great Hernan Crespo to victory against Japan's Yokohama F-Marinos over two legs in May's final.

Al Ain are one of two UAE clubs taking part in this year's edition, with teams from Qatar, Iran, Uzbekistan and Iraq completing the West zone line-up. In the East, clubs from Japan have posted the best results in recent years and Yokohama return to the Champions League to spearhead their cha.