The 19-year-old will face another qualifier -- Nadia Podoroska of Argentina in the semifinals. The latter stunned third-seeded Elina Svitolina 6-2, 6-4 to advance. Enditem
Elsewhere Villarreal's Gerard Moreno retains his place in the squad after an excellent start to the season, as does FC Barcelona's Ansu Fati, who scored in the 4-0 defeat against the Ukraine a month ago. Meanwhile Mikel Oyarzabal is also recalled after he too had to drop out in September after testing positive for COVID-19.
Gaston is to challenge third seed Dominic Thiem in the fourth round. Earlier in the day, the Austrian had claimed another straight-sets victory over 28th seed Casper Ruud, beating the Norwegian 6-4, 6-3, 6-1.
During the 18-round campaign, teams face lung-busting altitude, scorching tropical heat, long-haul flights between many cities and passionate fans that make stadiums such as Argentina's La Bombonera or Brazil's Maracana among the world's most inhospitable venues for opponents.
The match will be Iran's first game at the national level under the leadership of Dragan Skocic.
Wuhan and Jiangsu were placed second and third in the league's championship group before Tuesday's third-round matches, and both teams needed to secure their place in the top two after this round to reach the league final.
Although it is still very early days, the signs are much better at FC Barcelona than many expected before the season started. Ronald Koeman's team has won its first two games with ease, netting a total of seven goals without conceding and the image on the pitch has been much better than the side that looked sad and tired during Quique Setien's time in charge.
With the result, Dortmund now sits third in the table, whereas Freiburg suffered its first defeat and slipped to the 11th spot.
The 2014 world champion has been hit with full vigour by the unpleasant effects of the COVID-19 pandemic.
The Spaniard, who is seeking his 13th title at Roland Garros, defeated Sinner 7-6 (7-4), 6-4, 6-1 to set up a rematch with Diego Schwartzman on Friday.
Dilana took center stage early on by scoring seven points in a row, while Yang Shuyu provided much-needed help beyond the arc. The duo combined for 17 points in the first quarter to propel Dongguan to a 22-13 advantage.