World No. 7 Robin Ammerlaan of the Netherlands added the US Open USTA Wheelchair Tennis Championships to his long list of career titles on Sunday after world No. 1 Shingo Kunieda of Japan withdrew from their scheduled men's singles final with an elbow injury, handing Ammerlaan a walkover.
The rain that had caused the postponement of the main draw doubles finals on Saturday evening continued into the last morning of play at the Dwight Davis Tennis Centre, causing the remaining main draw singles finals to be delayed.
However, once play was able to start Esther Vergeer wasted little time in taking her tally of US Open Super Series titles into double figures as she swept aside her compatriot and world No. 2 Jiske Griffioen 60 60.
In winning her tenth US Open USTA Championships crown Vergeer secured her 49th victory over Griffioen without a single loss in their head-to-heads on the NEC Wheelchair Tennis Tour, but Sunday's victory was Vergeer's first in which she hasn't lost a game to Griffioen.
Norfolk wins sixth US Open Super Series title
For the second Super Series final in succession world No. 1 Peter Norfolk of Great Britain defeated American world No. 2 David Wagner on Sunday to retain his quad singles title in St. Louis.
Norfolk took his tally of US Open USTA Wheelchair Tennis Championships titles to six as a rematch of last year's final ended in a 63 61 victory for Norfolk, who had beaten Wagner in three sets in 2010 and exchanged victories in two close three set finals against the American in the previous two Super Series tournaments in France and Britain.
Norfolk's victory saw him level his head-to-heads against Wagner in 2011 at three wins apiece.
Griffioen and Van Koot add to Super Series tally, while Norfolk and Lapthorne prevail
While Kunieda's injury meant that he and Ammerlaan had to relinquish their men's doubles title to fourth seeds Michael Jeremiasz of France and Satoshi Saida of Japan, the women's doubles and quad doubles finals produced competitive contests.
Jiske Griffioen and Aniek van Koot sealed their fourth Super Series doubles title of the season after defeating the unseeded Japanese pairing of Kanako Domori and Yui Kamiji 64 63.
The result ended Kamiji's hopes of a second Super Series doubles title of 2011 after her success at the Japan Open with Dutchwoman Marjolein Buis.
The score in the women's doubles final was repeated in the quad doubles final as British second seeds Andrew Lapthorne and Norfolk won their first Super Series doubles title together.
Lapthorne and Norfolk, beaten in three close sets in the semifinals of last year's St. Louis tournament by the American partnership of Nick Taylor and David Wagner, avenged both that loss and their loss in the final of July's British Open as they wrapped up a 64 63 victory over the top seeds.
The reigning Doubles Masters and Australian Open champions have now beaten reigning Paralympic champions Taylor and Wagner in six of the eight doubles contests they have played.
US Open USTA Wheelchair Championships Super Series Draws
US Open USTA Wheelchair Championships Website
Griffioen edges van Koot in women's semis
Jeremiasz and Saida reach men's doubles final
Kamiji beats di Toro to reach semis
Reid, Fernandez stun Scheffers, Peifer
Jeremiasz and Fernandez advance in St. Louis