Manchester United's shock Champions League defeat to Swiss champions Young Boys has already ratcheted up the pressure on Ole Gunnar Solskjaer despite an impressive start to the Premier League season.
Ronaldo has hit the ground running since his return to the club from Juventus, scoring three goals in two games.
But the fanfare surrounding the five-time Ballon d'Or winner also brings greater scrutiny on Solskjaer in what was always likely to be a defining season for the Norwegian.
The Red Devils begin the weekend on top of the Premier League with 10 points from their opening four games, with a potentially tricky trip to West Ham on Sunday.
But some of the same flaws evident in midweek have also been on display in league games against Southampton, Wolves and Newcastle, only for United to be bailed out by their array of attacking talent.
Despite their three wins, the team have lacked cohesion and have struggled to gain control of games, relying on moments of isolated magic from players such as Bruno Fernandes and Paul Pogba.
Solskjaer has the unenviable task of striking a balance between defence and attack while keeping all his star names happy.
Marcus Rashford and Edinson Cavani are yet to feature this season due to injury, but will soon be competing for places with Ronaldo, Sancho, Mason Greenwood, Anthony Martial, Jesse Lingard, Donny van de Beek and Juan Mata.
Behind them, Fernandes and Pogba have started the season in fine form, but their compatibility in a midfield three against stronger opposition is still up for debate.
"We've got goals, I know that, it's about striking a balance in the rest of the set-up," said Solskjaer after Newcastle made Ronaldo's homecoming last weekend far trickier than the 4-1 scoreline suggests.
His attempts to find that balance in Switzerland were made tougher by Wan-Bissaka's dismissal but he drew criticism over his use of substitutes and tactics.
Solskjaer faced questions afterwards over why he took Ronaldo off at all and also over why he did not remove the 36-year-old earlier -- showing how difficult it will be to keep everybody happy. The only way to quieten the noise is by getting back to winning ways, starting at the London Stadium on Sunday.