Jannik Sinner's Sleeve at Wimbledon Explained by New Arm Injury originally appeared on Athlon Sports. Jannik Sinner has a new look to his all-white attire at Wimbledon, but it is not a welcome addition. Fans are noticing Sinner is doing his best Allen Iverson impression by wearing a white sleeve on his arm at the All England Club.

Jannik Sinner is through to the Wimbledon quarterfinals, though not in the way he wanted. Sinner lost the first two sets of his fourth-round match with Grigor Dimitrov on Monday before Dimitrov was forced to retire from the match after suffering an apparent pectoral injury.

No. 1 Janik Sinner advanced to the Wimbledon quarterfinals Monday after his opponent, Grigor Dimitrov, retired injured while he was leading their fourth-round match two sets to love.

World number 1 tennis player Jannik Sinner, who glided into the finals of Wimbledon, defeating Novak Djokovic, has been wearing a compression elbow sleeve due to an injury he sustained early in the tournament.

Follow our analysis and reactions from day eight at Wimbledon as Jannik Sinner and Novak Djokovic moved into the quarterfinals

And yet, Sinner did something rarely seen while at the net shaking hands with Djokovic following his victory: he apologized to the Serbian tennis star. Djokovic explained why Sinner felt moved to make such a classy gesture after the match.

After winning the first two sets and having Sinner in serious upset danger, Grigor Dimitrov had to retire due to injury in the third set. The 34-year-old from Bulgaria had battled injuries for much of his career, and he knew something was wrong with his pectoral muscle after a serve.