Poland's Iga Swiatek (L) and Belarus' Aryna Sabalenka pose before the 2021 WTA Finals Tournament women's singles match in Zapopan, Mexico, November 13, 2021. - The WTA Tennis Tournament finals, which were originally to be held in China, bagan Wednesday in Zapopan due to the Covid-19 pandemic. (Photo by Ulises Ruiz / AFP)