South African teenager Ronald Ramphadi booked his place in his first ITF 2 Series men's singles quarterfinal on the second day of the ACSA Gauteng Open, a part of the NEC Wheelchair Tennis Tour, as two more seeds exited the tournament in Benoni.
Ramphadi defeated Austrian eighth seed Wolfgang Stieg 61 64 to earn his place in the last eight against Japanese fourth seed Yoshinobu Fujimoto.
Richard Engles threatened to cause another upset when he took the first set of his second round match against his fellow Australian and second seed Ben Weekes, but Weekes dominated the remainder of the match to advance 46 62 60.
Three South African players are in the quarterfinals, with sixth seed Sydwell Mathonsi and seventh seed Eliphas Maripa joining Ramphadi in the quest to reach the semifinals.
Mathonsi will face Japanese top seed Takashi Sanada, who opened his challenge with a 60 60 victory, while Maripa will play fourth seed Daniel Rodrigues, one of two Brazilian players in the last eight alongside fifth seed Rafael Medeiros. Medeiros will now face Weekes.
Polidori edged past third seed Field
Former world No. 4 Giuseppe Polidori edged past third seed Adam Field as both Italian players in the quad singles draw overcame British opposition in the quarterfinals to ensure that one of them will feature in the final.
Polidori won the points that mattered to secure a tense 64 57 64 win over Field. Meanwhile, second seed Marco Innocenti had a much more straightforward 62 61 victory over Antony Cotterill to set up the all-Italian semifinal in the bottom half of the draw.
Top seed Lucas Sithole had few problems in securing his place in the last four after he beat fellow South African Bongani Dlamini 62 60. Sithole can expect a tougher semifinal against Malaysia's Azman Hasan, who won his quarterfinal against American Marc McLean 61 62.
Women's seeds ease into quarterfinals
All eight women's seeds enjoyed comfortable starts to their tournament after first round byes. The player to drop the most games was German top seed Sabine Ellerbrock, who beat Australia's Janel Manns 61 63.
Ellerbrock plays French sixth seed Christine Schoenn in the quarterfinals, with Schoenn being one of three players, along with Japan's Kanako Domori and Germany's Katharina Kruger, to reach the last eight without dropping a game.
Domori and Kruger will go head-to-head for a place in the semifinals, while fourth seed and home favourite Kgothatso Montjane will play seventh seed Francisca Mardones of Chile and Brazil's Natalia Mayara will play Dutch second seed Sharon Walraven.