Sweeting joined John Isner, Teymuraz Gabashvili and Ivo Karlovic in the quarterfinals of an American tune-up for this spring's French Open. Sweeting rallied to oust Querrey 3-6, 7-6 (7-5), 6-3.
In the quarterfinals, Sweeting will meet Gabashvili, a 7-6 (7-4), 6-3 winner over Grigor Dimitrov.
Karlovic, a former champion of this event, coasted by Igor Kunitsyn 6-4, 6-1 to set up a quarterfinal match against Isner.
Isner downed Horacio Zeballos 7-5, 6-3.
The rest of the quarterfinal spots will be decided Thursday in second-round matches featuring top-seeded Mardy Fish against Albert Ramos. Igor Andreev will meet Kei Nishikori, Guillermo Garcia-Lopez will face Somdev Devvarman and James Blake will take on Pablo Cuevas.
NBC reportedly holds celebs hostage to Jimmy Fallon's show
Aaron Carter is still in love with Hilary Duff