Kazakhstan's Dmitry Popko (R) serves past teammate Zhibek Kulambayeva against Germany's Laura Siegemund and Tim Puetz during their mixed-doubles match at the United Cup tennis tournament in Perth on January 1, 2025. (Photo by COLIN MURTY / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE -- (Photo by COLIN MURTY/AFP via Getty Images)
