The Manchester United boss played down suggestions English players get preferential treatment after the Argentine claimed he was less likely to be awarded penalties and free kicks
The Argentina international recently expressed his belief that English players had "privileges" which were not available to foreign players, after Roberto Mancini's side failed to get two penalty kicks during their match against Fulham on Saturday.
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However the veteran coach refused to become embroiled in the argument ahead of his side's Champions League clash with CFR Cluj, but did suggest that any reputation foreign players have, is down to their own actions over the years.
"As a subject it is not worth going down because we have known for quite a few years there are plenty of players diving and, you have to say, particularly foreign players," Sir Alex told reporters.
The Red Devils boss also complained about his own side's penalty claims over the weekend, in which he felt winger Nani was incorrectly refused a spot-kick after going down from a Jan Vertonghen challenge in their defeat to Tottenham.
"Nani is not the type to dive," said the United boss. "He has never been that type of player.
"It was a penalty kick on Saturday. Sometimes you get them, sometimes you don't.
"From the referee's position it was difficult because there were plenty of bodies in front of him. The linesman could have helped him but he didn't."