Mario Balotelli took the shine off Manchester City's FA Cup semi final win after the Italian was involved in a furious row with Manchester United players at the final whistle at Wembley.
Balotelli infuriated Sir Alex Ferguson's stars by celebrating in front of United's fans immediately after City's 1-0 victory.
The notoriously temperamental City striker held out his shirt triumphantly towards the United end and Anderson and Rio Ferdinand responded by chasing after him to remonstrate.
After angry exchanges with both United players, Balotelli was dragged away from the incident, but not before further enraging Ferdinand by winking at the England defender, who stormed down the tunnel before ripping off his shirt in frustration.
Asked about the incident, United goalkeeper Edwin van der Sar made it clear Balotelli's behaviour was unnecessary but stopped short of condemning his actions.
"I think he misunderstood which side of the stadium he had to thank his supporters," van der Sar said.
"Maybe in Italy they do it differently or something. Lets talk about football, it's much more important than these things."
City manager Roberto Mancini has grown used to Balotelli's occasionally explosive antics after working with the Italian youngster at Inter Milan and then bringing him to Eastlands from Italy last year.
Balotelli was sent off for a reckless challenge during City's Europa League exit against Dynamo Kiev recently and has also been involved in training ground bust-ups with his own team-mates, as well as earning Mancini's wrath on several occasions.
He was also involved in a several disagreements with then-Inter Milan manager Jose Mourinho last season and fell out with the Italian club's fans.
Mancini said he hadn't seen this latest incident as he was too busy celebrating City's first appearance in a Wembley final since 1981, secured by Yaya Toure's second-half winner.
"I didn't see it. I want to wait because every time, 'It's Balotelli's fault'," said Mancini.
When the incident was described to him, Mancini joked: "We can put him in jail? Next week, we can put him in jail for this."