World # 19, American John Isner (above).

In what is truly a disappointing development for the tennis world, John Isner has pulled out of Pilot Penn due to a ligament tear that will likely keep the American out of the US Open, where he should have had his best chance at any major to excel. 

John Isner will likely be knocked out of the U.S. Open after he was diagnosed with ligament damage in his ankle, per Judy Murray (via the Tennis Reporters). Isner admitted as much over his own Twitter account, saying:

Ankle is worse than I thought. Need a miracle

Isner injured the ankle during his match against the resurgent David Nalbandian at the Cincinnati Masters last week. Isner was up 5-4 in the first set, serving for the set, when he landed awkwardly and twisting his right ankle. Isner was forced to retire from the match. Although Isner was initially hopeful that the injury would be similar to the one he suffered to his ankle last year that didn’t knock him out for very long, that does not appear to be the case now.

Bad news indeed for Isner, who memorably won the longest match in tennis history over Nicolas Mahut at Wimbledon.  That match left him empty in the tank for Thiemo DeBakker in the 2nd round, but Isner, overall, has done well at the majors this year, beating Gael Monfils down under in a great match, before bowing out to Andy Murray in the round of 16.  Isner also impressively won his first match ever at Roland Garros this year.

Last year, Isner upset American Andy Roddick famously in the third round of the US Open in a Saturday night feature match.  Chances are, he would have played doubles here with Querrey, making it a further blow to tennis fans. 

Here’s to a speedy recovery.

If there is a bright side, perhaps it’s that Isner’s coach, Craig Boynton, who is also James Blake’s new coach, has more time to devote to the wayward star.

–Crack (