The accusations came following reports that Chelsea and City are to play against each other twice on a money-spinning tour of the United States, in St Louis and in New York, just days after the domestic season ends, the Mirror reports.
According to the Scot, the motive for the trip is purely financial even though both City and Chelsea are two of the richest clubs in the PL, adding that players need rest at the end of a grueling season, instead of tiring themselves further with more games.
Ferguson further said that unlike the two clubs, he will not force United players to play any games just for bringing in money for the club if the players have just completed a weary and a grueling season.
However, City's manager Roberto Mancini defended his side's decision, saying that although he accepted that the timing of his team's post-season tour from May 20-26 was not ideal, he and his players will take a relaxed approach to the trip.
According to Mancini, the trip to New York will be like going on a holiday, although he added that the players need to play the two games because they are necessary for the club.
Meanwhile, Ferguson also hit back at Mancini for accusing teams of rolling over against United this season and allowing them to build a 12-point lead in the title race.
Ferguson will take United on a three-week-long pre-season tour to Thailand, Australia, Japan and Hong Kong in a bid to meet the demands of their worldwide fan base, but they will play their final game of the season on May 19, the report added. (ANI )