LONDON, ENGLAND - JUNE 29: Donna Vekic and Stan Wawrinka attend the WTA Pre-Wimbledon party at Kensington Roof Gardens on June 29, 2017 in London, England. (Photo by Karwai Tang/WireImage)
LONDON, ENGLAND - JUNE 29: Donna Vekic and Stan Wawrinka attend the WTA Pre-Wimbledon party at Kensington Roof Gardens on June 29, 2017 in London, England. (Photo by Karwai Tang/WireImage)