Shingo Kunieda (JPN) and Esther Vergeer (NED) will attempt to become the first players to hold all four Super Series titles in the same year on Sunday after comfortably making it through the Men's Main Draw and Women's Singles finals respectively at the US Open, part of the NEC Wheelchair Tennis Tour, in San Diego.
Defending champion and World No 1 Kunieda proved dominant in his semi-final on Saturday against eighth seed Ronald Vink (NED) to earn a 60 61 victory.
For the second successive year Kunieda will now face World No 2 Robin Ammerlaan (NED) in Sunday's final. Ammerlaan stayed on track for a possible first US Open title after producing a virtuoso performance to ease past 1995 US Open champion and fourth seed Michael Jeremiasz (FRA) 60 60.
In the Women's Singles semi-finals World No 1 Vergeer came up against fifth seed Korie Homan (NED), who had taken a set off Vergeer in last year's quarter-finals in San Diego, before again doing the same in last week's Atlanta Masters final. However, although Homan gave Vergeer her toughest match yet this week she was unable to trouble the defending champion to any extent on this occasion s Vergeer clinched a 63 62 victory.
Vergeer will now face second seed Sharon Walraven (NED) in Sunday's final after Walraven won the points that mattered to edge out third seed Florence Gravellier (FRA) 64 63.
Second seeds Ammerlaan and Jermiasz sealed a successful defence of their Men's Main Draw Doubles titles with a 64 64 win over Japanese top seeds Kunieda and Satoshi Saida in Saturday's final.
Meanwhile, there was another successful title defence in the Quad Main Draw Doubles final on Saturday as top seeds Nick Taylor and David Wagner (USA) won the big points to fend off Dutch second seeds Monique de Beer and Dorrie Timmermans-Van Hall 64 63.
Top seeds Jsike Griffioen and Vergeer will bid to also retain their Women's Doubles title on Sunday as they take on second seeds Homan and Maaike Smit in an all-Dutch final.
While Griffioen and Vergeer have eased comfortably in to Sunday's final Homan and Smit had to survive two tie-breaks in their semi-final before seeing of third seeds Gravellier and Aniek Van Koot (NED) 76(2) 76(4)
US Open Drawsheets
US Open Super Series - Preview and Draws
Day 1 Report - Egberink delivers San Diego comeback
Day 2 Report - Rydberg and Hu beat seeds at US Open
Day 3 Report - Vink halts Houdet in San Diego
Day 4 Report - Wagner and Norfolk reach US Open Quad final