Ronaldo might be benched against Celtic as Carlos Tevez and Anderson are back in contention after missing Saturday's 4-0 win over West Bromwich Albion.
Paul Scholes, Owen Hargreaves and Michael Carrick miss out of course and they are joined in the stands by Patrice Evra who was taken off with a hamstring injury against West Brom and won't be risked tomorrow night.
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Brazil manager Dunga has recalled AC Milan midfielder Kaka to his squad for next month’s World Cup qualifiers, but the midfielder’s club teammate Ronaldinho has been sensationally dropped.
The move will spark much debate among the nation’s fans, particularly given that the 28-year old has featured in the side’s opening qualifying fixtures.
Manchester United boss Sir Alex Ferguson believes last night's Carling Cup victory over Middlesbrough was the best performance of the season from Anderson.
"Anderson, for example, has been feeling the effects of being in China [at the Olympic Games]," revealed the boss.
Sir Alex Ferguson has backed his Manchester United side to bounce back from their Premier League defeat at Liverpool.
Manchester United have named their former midfielder Mike Phelan as assistant manager, while Rene Meulensteen becomes first team coach.
Phelan, 45, replaces Carlos Queiroz, who left his position to take over as Portugal's coach in July.
Dutchman Meulensteen is promoted from technical skills development officer.
Manchester United failed to become the ninth British winners of the Uefa Super Cup when they lost narrowly 2-1 to an impressive Zenit St Petersburg in Monaco.
For the first 60 minutes Zenit were comfortably two goals ahead through a fist half header from Pogrebnyak then a wonderful solo effort from Portuguese star Danny on 58 minutes.
Sir Alex has taken a 19-man squad to Monaco for Friday night’s Super Cup clash with Zenit St Petersburg.
The Reds left Manchester Airport on Thursday morning at 09:00 BST and will train at Stade de Louis II later in the day. Kick-off on Friday night is at 19:45 BST.
Anderson is delighted Cristiano Ronaldo is staying with Manchester United.
"Having the best player in the world is always good for you," said Anderson. "Moreover, he is a great friend."
Anderson missed United's 1-1 draw with Newcastle as he is away with Brazil at the Beijing Olympics, but added: "I followed the match on the internet and spoke to my teammates via email.
Manchester United boss Sir Alex Ferguson may pull Anderson out of Brazil's Olympics Games bronze medal playoff against Belgium.
With Michael Carrick, Ryan Giggs and Owen Hargreaves out, the United boss is short on midfield options for Monday night's Premier League clash at Portsmouth.