The 21-year-old left back, who picked up the injury just before Saturday's DFB Cup final over Borussia Dortmund in Berlin, is however expected to be fit again in good time for the start of the double winners' pre-season on 9 July.
Bonus break for Robben
, meanwhile, is one of a healthy number of FC Bayern stars hoping his own 2013/14 campaign will be approaching a triumphant climax in Brazil around that point. The flying Dutchman has been given two days extra holiday by Oranje head coach Louis van Gaal.
While the rest of the Netherlands squad flew out to Lagos on Tuesday for a week-long training camp, Robben's presence is not required in Portugal until Thursday. Alongside Manchester United's Robin van Persie, the FC Bayern no10 is the only player van Gaal has already assured of a place on the plane to Brazil.