Greece's Maria Sakkari (R) and Stefanos Tsitsipas discuss tactics during their doubles match against Spain's Yvonne Cavalle-Reimers and Sergio Martos Gornes at the United Cup tennis tournament in Perth on December 28, 2024. (Photo by COLIN MURTY / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE -- (Photo by COLIN MURTY/AFP via Getty Images)