Del Potro Battles Back To Reach Delray Beach Quarterfinals
Still rounding himself back into form after a long layoff, Argentina’s Juan Martin del Potro showed some signs of rust in his second round match at the Delray Beach Open on Thursday, but hung on to defeat Damir Dzumhur of Bosnia-Herzegovina 7-6(5), 4-6, 6-3 and reach the quarterfinals. “It was a really tough match for…

