Pires said: "Beckham could really help PSG in the second part of the season if he is in really good physical shape. I don't doubt about his ability but it will be hard for him to maintain his rhythm and complete games for a club like PSG.
"His age could be overcome by bringing in a level of experience and intelligence to the squad which could be important.
"Beckham will be important for the forwards and his assists can be very useful. But the adaptation to European football again may be difficult."