LONDON — Defending champion Bradley Wiggins will not race in this year’s Tour de France because of a knee problem.

The British rider withdrew before the 13th stage of the Giro d’Italia two weeks ago because of a chest infection. Team principal Dave Brailsford says “with illness, injury and treatment Brad has gone past the point where he can be ready for the Tour.”

Wiggins calls it a “huge disappointment.” He says he “desperately wanted be there, for the team and for all the fans — but it’s not going to happen.”