England boss Roy Hodgson has expressed his frustration at the fixtures in St Louis and New York as it means any players involved will not return to the UK until May 26, the same day the Three Lions are due to report for friendlies against the Republic of Ireland and Brazil.
Unless a solution is found, it means the Football Association's gesture of arranging friendlies ahead of the official FIFA window to get players on holiday quicker will have backfired because they cannot demand release.
Yet it appears Ferguson and Mancini are united in their belief the matches should not actually be happening.
"I was surprised to see they were playing two games," said Ferguson.
"It can only be because of whatever financial gains they're getting out of it. They're the two richest clubs too. They must need the money.
"I wouldn't do it, I must admit. Players need to get their rest at the end of the season." Which chimes exactly with Mancini's assessment.
"Usually I don't like this because when we finish the season it is finished," said the City boss.
"The players need to go home for one week because afterwards they should go with national team.
"It is not for me. We go to play two games for the club because it is important - but I don't like to go (on tour) after the championship."
City officials have privately suggested all their England players - including Joe Hart and James Milner - will be required for the Chelsea games.
However, Mancini has suggested Hodgson will get the men he wants.
"If he needs a player we don't have a problem," said Mancini.
Ferguson has questioned the whole rationale behind international friendlies on Friday, whilst stating he had no problem releasing players for competitive games.
Yet the Scot's position is not quite so straightforward.
For he has concerns about how younger players come through international tournaments, which could be an issue this summer given new signing Wilfried Zaha is set to be in Stuart Pearce's England squad for the European Under-21 Championships in Israel.
"I always think, with young players, the best chance for them to develop physically is in the summer, when the sun comes out," he said.
"It's an actual fact that the main growth spurts of young people are always in the summer.
"But a lot of these international tournaments, Under-17s and Under-18s, Under-19s and Under-21s, always seem to be in the summer."
Ferguson cites the example of Michael Owen, who at Soccerex this week repeated his belief that many of the injury problems he has experienced in the latter stages of his career stem from the amount of punishment he took at the start.
"I always thought if Michael Owen had got the proper development, he would have been an absolute world-class player," said Ferguson.
"But he had a youth tournament in 1997 in Malaysia for a month.
"We had two players in it and gave them a month off when they came back.
"Michael came back and was in the Liverpool team the next week, then played in the World Cup the following summer.
"You have to develop players physically as well as technically and these tournaments don't always fit."