WIMBLEDON — Novak Djokovic has been given permission by the All England Club to wear a grey knee brace at Wimbledon ... For clothing, players must be wearing “almost entirely white” from ...

However he risked being punished for sporting a grey knee brace. Wimbledon enforces a famously strict all-white policy that players must adhere to. Meaning Djokovic's grey knee brace was ...

John Isner, who suffered a knee injury in the second round of Wimbledon that forced him to retire from his match, says he’s now feeling better. Isner hurt his knee while coming down from a serve.