Mexico's Claudia Taboada sealed a place in the quarter-finals of an International Tennis Federation (ITF) 1 Series event for the first time after she recovered from a set down to beat eighth seed Francisca Mardones on the second day of the Pensacola Open in Florida.
Taboada lost the first set 6-0 to the Chilean but she then launched a spirited fightback, eventually progressing by virtue of a 0-6, 6-4, 6-2 win to book a meeting with Germany's top seed Sabine Ellerbrock in the last eight of the event, which forms part of the UNIQLO Wheelchair Tennis Tour.
It proved to be a tough day for the seeded players as in the men's draw, France's Michael Jeremiasz toppled Marc McCarroll after he came from behind to oust the Briton in three sets.
The world number 23 struggled early on as McCaroll showed why he is seeded sixth for the tournament, but Jeremiasz, returning from a seven-month injury lay-off, came through to win 2-6, 7-5, 6-1.
Jeremiasz faces a tough task if he is to reach the semi-finals as he will now play another Briton, defending champion Gordon Reid, who also had to overturn a first-set deficit before he prevailed with a 6-7, 6-4, 6-4 victory against countryman Brit David Phillipson.
Sweden's Stefan Olsson, a former world number two, reached the quarter-finals thanks to a 6-1, 4-6, 6-3 success against Brazil's Daniel Rodriguez, and will meet Belgian second seed Joachim Gerard in the last eight.
Elsewhere, France's Nicolas Peife, South Africa's Evans Maripa and Australia's Adam Kellerman all sealed a comfortable progression into the next round with respective 6-1, 6-0 victories.
In the women's draw, most of the world's top-ranked players enjoyed a relatively straightforward day as second seed Jordanne Whiley won an all-British clash with Louise Hunt, while there was also a convincing win for The Netherlands' third seed Marjolein Buis triumphed without dropping a game.
The quad singles event saw the imperious American doubles duo of David Wagner and Nick Taylor go head to head, and it was Wagner who proved too strong for his partner with a 6-0, 6-0 thrashing.
The pair then resumed normal service by teaming up to win an All-American affair against Greg Hasterok and David Jordan 6-4, 6-0.
They will now meet Britain's Jamie Burdekin and Andy Lapthorne in the final after they eased to a 6-3, 6-0 success over Israeli duo Itay Erenlib and Haim Lev.
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