Alexander Zverev and Laura Siegemund will play mixed doubles for Germany at the upcoming Paris Olympics, the German tennis federation DTB said on Thursday. Zverev is the singles gold medallist from the Tokyo 2020 Games while Siegemund is a triple grand slam champion in women’s and mixed doubles. They played mixed doubles together in Germany’s run to the title at the United Cup in January in Australia. The Olympic tournament July 27-August 4 is at Roland Garros where Zverev was a finalist in the French Open singles event last month and Siegemund won the mixed doubles title with French player Éd…