NEW YORK (AP) -- Juan Martin del Potro was aching for a second crack at a Grand Slam semifinal, a second chance to prove he has what it takes to win at that stage.By early Thursday evening, he knew he'd get that opportunity at the U.S. Open, thanks to a wind-swept 4-6, 6-3, 6-2, 6-1 quarterfinal victory over 16th-seeded Marin Cilic of Croatia.
What the sixth-seeded del Potro still did not know by the end of the night, however, as rain washed over Flushing Meadows: The opponent he will have to beat to reach his first Grand Slam final.
That's because the quarterfinal between six-time major champion Rafael Nadal and 2007 Australian Open runner-up Fernando Gonzalez was postponed by showers during the second set.
The first rain delay, of about 75 minutes, came at 2-2 in the second set, after Nadal won the opening set in a tiebreaker. The second interruption came at about 10:20 p.m., with Nadal holding a 3-2 lead in the second-set tiebreaker.
At midnight, tournament officials suspended play for the night, sending Nadal and Gonzalez home.
And leaving del Potro still waiting.
The breaks might have been helpful to Nadal, who called for a trainer after the first set. It appeared Nadal was being checked for a flare-up of a stomach muscle problem that bothered him earlier in the tournament.
"In the first set, it was very, very bad," Nadal's uncle and coach, Toni, said in a second-set interview with ESPN2, which was televising the match in the U.S. "Now, it's a little better. It's difficult. We must win this set."
Nadal was going to have to wait to try to do that. Organizers had hoped to conclude the match Thursday, because Friday's forecast called for more rain.
