The Moroccan moved to Italy shortly before transfer deadline day, and the QPR boss admitted that he was shocked by the switch.
"It's an amazing game isn't it?" he told reporters.
"He's been [on loan] at Fulham who are bottom of the Premier League and then he goes on to AC Milan. In my day you had to be a world-class superstar to go to AC Milan.
"It's a great move for him and he's got to knuckle down because he has the talent, and I wish him well."
The R's are currently second in the Championship.