NEW YORK (AP) — An additional 13 teams, one featuring Venus Williams and some comprised of married couples, have entered…NEW YORK (AP) — An additional 13 teams, one featuring Venus Williams and some comprised of married couples, have entered the U.S. Open mixed doubles championship. Top-ranked Aryna Sabalenka and 24-time Grand Slam singles champion Novak Djokovic headlined the initial list of 16 teams who entered. Teams can enter until Aug. 17, when the six duos with the best combined singles rankings at the time will be automatically entered into the main draw. That means Sabalenka, the two-time defending U.S. Open women’s champion, and Djokovic, still ranked No. Eight teams will be given wild cards by the USTA, and two other teams will play their way into the field through a new qualifying tournament to be held Aug. 24.