FC Bayern Munich have hit out at South American national teams for what they say is a careless way of handling injuries.
The club's CEO, Karl-Heinz Rummenigge, said the football associations must "significantly improve their medical treatment."
Following the latest international break, Bayern's Brazil international Douglas Costa returned to Germany with a bruise to his foot, and missed the next Bundesliga match at Werder Bremen. The winger returned at Arsenal.
Chile international Arturo Vidal also nursed minor knee problems, and the midfielder allegedly received injections to take part in the clash with Uruguay.
In the match day programme for Bayern's upcoming league game against 1.FC Cologne, Rummenigge has hit out at the associations.
"I am currently appealing to the South Americans to significantly improve their medical treatment," Rummenigge wrote, adding that players "in part have not received serious treatment."
"We've only recently experienced it with Douglas Costa. The Brazilians just put him on a flight after the match along the lines of devil-may-care," he said. "His foot injury at least would have needed a pressure bandage."
The Bayern CEO explained that the club have no plans to not allow the South Americans trips to their national teams, but "it just can't be that the associations send back the players to their clubs without professional treatment."
Elsewhere, on an otherwise training-free day at Bayern's facilities, several injured players continued to work on their comebacks.
Winger Franck Ribery, 32, who had to end Wednesday's training session after less than 20 minutes, "exercised cautiously with the ball -- albeit in running shoes," the official club website said.
Defender Medhi Benatia, out since late August, also "completed drills with the ball," and both Javi Martinez and Kingsley Coman appear to have overcome muscular problems and are set to return to the squad on Saturday.