Cristiano Ronaldo returned to training with Manchester United team-mate Wayne Rooney on Monday for the first time since their World Cup clash.
Ronaldo and Rooney clashed at the World Cup
The 21-year-old winger was criticised for his part in England striker Rooney's red card during Portugal's World Cup quarter-final win on 1 July.
He appeared to urge referee Horacio Elizondo to take action against Rooney for his challenge on Ricardo Carvalho.
Rooney played for United in Monday's 2-1 friendly win at Macclesfield.
It will be his first match since the World Cup but Ronaldo will not play and will instead continue his pre-season build-up on the training ground this week.
In the aftermath of their confrontation, Ronaldo insisted he would have to leave Manchester United - and was heavily linked with a move to Real Madrid.
However, Ronaldo and Rooney are believed to have made their peace after the incident.
United boss Sir Alex Ferguson insisted Ronaldo was not for sale but doubts still persist over his Old Trafford future.
Ronaldo was returning to United's Carrington training headquarters after being given an extended break following Portugal's World Cup campaign.
Portugal's final game was on 8 July - a defeat in the third-place play-off against hosts Germany.
It is understood United have drafted in extra security to cope with any abuse Ronaldo might attract.
When Rooney arrived before his colleague at training, he was ironically greeted by an autograph hunter wearing a Portugal shirt bearing Ronaldo's name.
United hope a public truce with Rooney will take the sting out of any abuse Ronaldo may receive - and also remove any doubts he has about staying in the Premiership.
Meanwhile, referee Elizondo has criticised Rooney's behaviour in Gelsenkirchen, saying: "Rooney was complaining all the time, always coming close to you and saying 'referee this, referee that'.
"Protests and more protests. He reminded me of my kids."