Cristiano Ronaldo made his first Manchester United appearance under Erik ten Hag in the final pre-season match against Rayo Vallecano ahead of the new campaign.
The 37-year-old has made his desire to leave United before the close of the transfer window at the end of August clear but has found suitors for his services difficult to come by.
Having missed the squad's pre-season tour of the Far East and Australia due to family reasons, Ronaldo was once again absent for the defeat against Atletico Madrid in Oslo on Sunday.
It was confirmed, however, that Ronaldo would feature in Monday's friendly against Rayo Vallecano at Old Trafford - with the former Real Madrid and Juventus star named in the starting line-up.
Ronaldo played the first half at Old Trafford before being replaced at the interval by Amad Diallo, who promptly opened the scoring immediately upon his introduction.
With just 45 minutes of pre-season football under his belt, Ronaldo seems unlikely to play the entirety of Manchester United's pre-season opener against Brighton and Hove Albion next weekend.
Ten Hag has already made that clear, saying on Saturday that he was not "on the level" of his teammates.
"I cannot tell in this moment [how fit he is]. He is not on the level of the rest of the squad because he missed a lot of weeks. But he needs games and he needs training, a lot," he said following the defeat to Atletico.