Manchester City deny players are unhappy with plans of a post-season tour of the US.
Club bosses plan to take Mancini's squad on a week-long trip to New York and Miami once the season is over.
A club source told the Daily Star: "A lot of the lads were due to go away with friends or family as soon as the season finished.
"Instead, they will spend another week training and playing practice matches, which they cannot comprehend.
"It has been a long old season, especially for the likes of David (Silva) James (Milner), Joleon (Lescott), Joe (Hart) and Gael (Clichy) who were all involved in Euro 2012.
"Several senior squad members raised their concerns with the club, but it hasn't changed the plans for the summer tour.
"The manager is fully behind the tour and is putting plans for that week in place."
But City insist that most players have welcomed news of May's tour and are looking forward to spending a week in the US.
A club spokesman said: "I'm not aware of any players having had to cancel holidays, but at the end of the day they are contracted to the club so the tour will take priority.
"The feeling is that the squad are looking forward to going.
"It will be a relaxed trip because of the timing of it."