Pakistan, June 18 -- Imagine Carlos Alcaraz and Emma Raducanu competing together for a Grand Slam trophy. How about Madison Keys and Frances Tiafoe as a duo? Iga Swiatek alongside Casper Ruud? Or Naomi Osaka with Nick Kyrgios?

Those are among the high-wattage pairs on Tuesday's preliminary entry list for the reimagined U.S. Open mixed doubles tournament on Aug. 19-20, before singles competition begins Aug. 24.

Ten of the top 11 women in the WTA singles rankings - Coco Gauff, who just won the French Open for her second Grand Slam title, is the only one missing - and 10 of the top 11 men on the ATP tour, including No. 1 Jannik Sinner and 24-time major champion Novak Djokovic, have registered to compete for the $1 million top prize that wi...