January 9, 2013 — Top ranked American and world No. 13 John Isner has officially withdrawn from the 2013 Australian Open due to a bone bruise in his knee.
On Wednesday, top-seeded at the Sydney tournament, Isner went out to qualifier Ryan Harrison, 6-4 6-4, hinting at continued issues with his knee.
“I have been feeling some discomfort in my knee and have recently learned that I have a bone bruise,” Isner said. ”Doctors have told me that continuing to play on the knee could result in a more serious injury.”
Isner also pulled out of last week’s Hopman Cup exhibition tournament in Perth after losing both of his matches against Jo-Wilfried Tsonga and Kevin Anderson in order to be ready for Sydney. Via Twitter, Isner’s manager stated that the American “gave it a weeks rest before the match and wanted to test it.” But it was not meant to be.
Fellow American Mardy Fish withdrew last month due to continued recovery from his heart troubles, leaving No. 22 Sam Querrey as the highest-ranked American left in the main draw of the year’s first Slam.