Ferguson blasts City
The Italian boss was sacked on Monday having failed to retain the Premier League title he won last season and after losing the FA Cup final to Wigan Athletic.
Mancini took out a full-page advertisement in the Manchester Evening News on Saturday, thanking fans for their support during his time in charge.
The former Inter Milan manager said in the ad: “Manchester City Supporters 3 unforgettable years, you will always be in my heart, ciao, Roberto Mancini.”
Ferguson rallied behind his former rival and questioned the logic behind sacking a manager who won the Premier League and FA Cup during his three years in charge.