Gary Neville could find himself in trouble with the FA after he appeared to direct a gesture towards Carlos Tevez as the Manchester City striker celebrated the first of two goals in his side's 2-1 Carling Cup victory over Manchester United.
Tevez celebrated running towards the United bench while making a speaking motion with his hand and the FA have confirmed they will look at the matter before deciding whether to take any further action.
Neville, warming up as a substitute, responded with a one-finger gesture that could potentially bring punishment from the FA given the warning he received over his provocative celebration in United's derby win in the Premier League in September.
Tevez followed his match-winning second goal with another sprint towards the United bench, this time with hands cupped behind ears. Neville had publicly backed United manager Sir Alex Ferguson's decision not to sign Tevez before the first leg tie at Eastlands.
"I don't know about this situation," said City boss Roberto Mancini. "I only hope that he plays the same way in the second game because he played a big game tonight. I am very happy for Carlos. He is an ex-Manchester United player so this game was very important for him. To score two goals was excellent."