Serena Williams and Carlos Alcaraz will team up at the US Open. Here's where to watch mixed doubles online.

Tennis stars Serena Williams and Carlos Alcaraz are set to team up as partners in the mixed doubles event at the 2026 US Open. Other high-profile pairings also include players such as Aryna Sabalenka and Novak Djokovic. Business Insider has published a guide detailing where fans around the world can watch the mixed doubles matches online.