She jumped to a 4-1 lead in the first set Monday, but Vinci stayed poised and patient. Vinci, who had never faced the younger Italian before, started attacking her forehand, and Giorgi's mistakes mounted. She finished with 35 unforced errors to 20 winners.
"The problem wasn't the opponent,'' Giorgi said. "The problem is that I wasn't myself on court today.''
Vinci is one of only two players seeded in the top 10 left in her half of the draw, along with No. 2 Victoria Azarenka.
About two hours after play was halted, the courts had been dried but the players weren't warming up. Sure enough, rain started to fall again. The forecast for the rest of the day didn't look much better, threatening to postpone matches involving Rafael Nadal, Roger Federer and Azarenka.
Arthur Ashe Stadium is finally getting a roof, the U.S. Tennis Association announced last month. But that won't happen until 2016 at the earliest. For now, rain delays are the reality at Flushing Meadows.
If Nadal and Federer win their fourth-round matches whenever they're actually played they'd meet in a quarterfinal of 29 combined Grand Slam titles. The great rivals have met 10 times at major tournaments, but never before the semis.
The potential matchup in the quarters is a byproduct of Federer falling to a seeding of No. 7. His fourth-round opponent is 19th-seeded Tommy Robredo.
The second-seeded Nadal is scheduled to take the court after Federer, facing No. 22-seeded Philipp Kohlschreiber.
- AP