Ronaldo has been linked with a potential move away from Old Trafford after hinting at his determination to play Champions League football in the 2022/23 season.
United boss Erik ten Hag has stated his ongoing commitment to retaining the Portuguese international but the exit rumours have continued.
Ronaldo missed United’s preseason tour of Thailand and Australia, due to personal reasons, with speculation continuing over his future in Manchester.
However, with the Premier League season due to kick off for United on August 6 he is now back in the UK after an extended break in Portugal.
United take on Rayo Vallecano in their final preseason game, on July 31, and Ronaldo could feature, as a potential move away is unlikely to be resolved before August.