Wawrinka pulls out of Rotterdam, del Potro questionable
"Unfortunately I'm not in the form to compete in Rotterdam," said Wawrinka, who won a Davis Cup match last Friday against host Serbia. "I hope to be back on court very quickly.”
Del Potro, who has been dealing with wrist problems for years, recently visited the Mayo Clinic in Minnesota to have his sore left wrist treated. The world No. 4 had surgery on his right wrist in 2010.