In today's semifinal thriller against Stanislas Wawrinka, Novak Djokovic has met his biggest challenge of the 2013 U.S. Open yet. The grueling five-set match has gone nearly four hours, with the score currently tight at 2-6, 7-6, 3-6, 6-3, 4-3, either man could head to the finals on Monday evening.

Once again, Djokovic is wearing the adidas Barricade 7.0, this time opting for a bright red variation. With Torsion System technology, the Barricade 7.0 is heavily supportive. Pick them up today for $110. Djokovic's also wearing his Uniqlo 2013 U.S. Open performance wear collection, which you can shop here.

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