That sore loser behaviour came days after Ferguson took aim at the Italian. City football development executive Patrick Vieira's suggestion that Paul Scholes' retirement U-turn was brought on by 'desperation' was scoffed at by Fergie, who responded by taking a dig at the recalling of Carlos Tevez.
"If you're talking desperation, they were playing a player the other night who refused to go on the pitch and the manager said he'll never play again. He takes a five-month holiday in Argentina. What is that? Could that come under the description 'desperation?'"
Bringing Tevez back into the fold, with his match-winning ability, makes sense for Mancini. But it is a sad indictment on City and destroys his own integrity after publicly stating Tevez would never wear the club shirt again.
It's a move that could very well win him the league. But if it doesn't, it will go down as a desperate act against principle - the man in charge succumbing to a man that epitomises everything that is wrong about overpaid footballers.
Sir Alex will delight in Roberto's discomfort and reassured us once again that he is ready for the final stanza of the season: "I've got plenty of ammunition, don't worry." United currently have the initiative and three points more than their neighbours, but Mancini needs to keep it together before the two teams meet again on 30 April.
He has led City through an outstanding season, but it's the final weeks that will determine whether he can deliver Blue Mancunians their first title in 44 years. Until the title is decided, we'll be squeaking on the edges of our seats.
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