The tennis world awoke to a surprise Monday October 21, with Aryna Sabalenka replacing Iga Swiatek as world No. 1 in the WTA rankings. Sabalenka, who has won two Grand Slam titles in a sterling season, has been engaged in a battle for supremacy with Swiatek — who has a Grand Slam title of her own, and five titles in 2024 to Sabalenka’s four — all year. It was expected to run until the season-ending WTA Tour Finals in Riyadh this November, where Swiatek is defending champion. Instead, Swiatek los