Fans believe they've cracked the code behind a cryptic Cristiano Ronaldo tweet - after he posted 'who's counting?' following yet another goal for Al-Nassr.  

Ronaldo, 39, posted the mysterious tweet on Wednesday asking after scoring for Al-Nassr on Tuesday, and shared a photo of him celebrating.

That was the 874th goal of his career and it secured Al-Nassr a 1-0 win away from home in the first leg of their Asian Champions League last 16 tie with Al Feiha. 

He debuted a new celebration to mark the goal, running to the corner flag, jumping, and putting his hands on his chest in a diversion from his trademark 'Siuuu' routine.