Serena Williams wore a custom-made Nike outfit at the 2022 US Open.Elsa/Getty ImagesMany tennis players partner with luxury brands like Rolex, Tiffany, or Off-White.Stars like Serena Williams and Roger Federer wear outfits worth thousands of dollars on the court.These are some of the most expensive outfits seen at tennis matches around the world.Tennis is one of the few sports where the players are allowed to express their individual style — and many do that by partnering with luxury brands such as Rolex, Tiffany, and Off-White.It means players like Serena Williams, Emma Raducanu, and Roger Federer have taken to the court wearing thousands of dollars — and in one case, over $1 million — worth of clothes, sneakers, or accessories.And these are only the items with disclosed values — many tennis stars wear custom creations that it's impossible to put a price tag on.Here are some of the most expensive outfits worn on the court, from the US Open to Wimbledon.Emma Raducanu played her opening match of Wimbledon in 2022 wearing tens of thousands of dollars' worth of jewelry.Emma Raducanu after her victory over Alison Van Uytvanck at Wimbledon 2022 wearing Tiffany jewelry.Simon Stacpoole/Offside/Offside/Getty ImagesThe British tennis star played her first match wearing £30,000 (around $38,000) worth of Tiffany jewelry, The Daily Mail reported.Raducanu, who became an ambassador of the iconic brand in September 2021, reportedly wore a pair of pearl earrings worth £7,575, a matching necklace worth £3,875, and a white-gold bangle encrusted with diamonds worth £18,900.Rafael Nadal sported a $1.1 million watch at the French Open in 2024.Rafael Nadal after his defeat by Alexander Zverev at the 2024 French Open, wearing a Richard Mille watch.Clive Mason/Getty ImagesWWD reported that Nadal's Richard Mille watch, called the Carbon TPT B.4 RM27-05M Manual Winding Flying Tourbillon, is worth a staggering $1.1 million.