Del Potro, the 2009 U.S. Open champion, is sitting out the year's first Grand Slam tournament, the Australian Open, as he continues to recover after fracturing his right kneecap in October. The Argentine is currently ranked No. 5.
He won the U.S. Open in 2009 and was the runner-up at that major last year. This would be his third consecutive appearance at the Delray Open.
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