FC Bayern München have announced Bastian Schweinsteiger is to undergo ankle surgery for the second time since the end of last season.
The European champions' chief medical officer, Dr Hans-Wilhelm Müller-Wohlfahrt, said there has been an increase in "post-operation ossification" in the midfielder's right ankle, adding: "This is causing tendonitis due to mechanical stress."
As a result, the 29-year-old is set for an unspecified period on the sidelines. Intensive treatment had enabled Schweinsteiger to play on – he featured most recently in the Bavarians' 1-0 UEFA Champions League victory on Tuesday against FC Viktoria Plzeň – but the German international has "now come to a point where an operation is unavoidable".
"The last few weeks have been really painful for me," explained Schweinsteiger, who has made ten Bundesliga appearances this term.
©UEFA.com 1998-2015. All rights reserved.