Manchester City boss Roberto Mancini is under new pressure over his row with Carlos Tevez - thanks to his son.

The Daily Mail says Mancini's row with Tevez took a remarkable twist when it emerged his son refused to come on as a substitute for Manchester City.

Filippo Mancini stunned coach Andy Welsh when he ignored his instructions 10 minutes from time against Liverpool reserves on August 10.

Mancini's youngest son Andrea had already come on for the Elite Development Squad as a second-half substitute when the amazing incident took place at Hyde United's stadium.

Welsh ordered Filippo to come on in the pre-season friendly, but the Italian refused and watched the rest of the game from the sidelines.

The revelation compromises Mancini in his fierce dispute with Tevez after the City striker appeared to ignore the manager's instructions to go on against Bayern Munich.

A City official said: "Filippo is a non-contracted, unpaid player who was on the substitutes' bench for the non-competitive game.

"In these circumstances, a disciplinary procedure would have been invoked. However, as he was not an employee of the club, this was not a viable option.

"The matter has been dealt with internally. Roberto Mancini was not aware of this incident."