Madison Square Garden. Photo by Dean Moses Madison Square Garden was electric on December 8, 2025, as 17,435 fans packed into The World's Most Famous Arena for The Garden Cup, a one-night showcase that blended high-level tennis, exhibition-style entertainment, and big-name star power. With a lineup featuring Aryna Sabalenka, Naomi Osaka, Nick Kyrgios, and Tommy Paul, the night delivered exactly what it promised: a mix of serious competition and playful showmanship under the New York lights.