Emma Raducanu has secured a lucrative multi-million-pound sponsorship agreement with Japanese fashion giant Uniqlo, bringing an end to her eight-year association with Nike.The 2021 US Open champion’s switch mirrors Roger Federer’s, who left Nike for the same brand in 2018.Raducanu was just 15 when Nike first signed her in 2018.Just three years later, she achieved a remarkable triumph at Flushing Meadows, where she claimed the title as an 18-year-old qualifier.The deal is set to take effect immediately.The British number one has now joined an elite group of tennis stars backed by the brand.The Japanese retailer hinted at the partnership on Monday.They posted a social media photo featuring a female tennis player’s torso clad in a blue dress with a matching wristband, bearing Uniqlo’s distinctive red square logo.Emma Raducanu has secured a lucrative multi-million-pound sponsorship agreement with Japanese fashion giant Uniqlo | UNIQLO/INSTAGRAM/EMMARADUCANUThe Brand wrote: “We’re proud to welcome a new face to UNIQLO.”Raducanu now joins a prestigious roster of tennis ambassadors, including Federer.The Swiss player famously unveiled his Uniqlo deal by simply appearing on Centre Court at Wimbledon 2018 wearing the brand without prior announcement.Former world number one Novak Djokovic was sponsored by Uniqlo between 2012 and 2017, whilst Japanese star Kei Nishikori remains a long-standing global ambassador.Emma Raducanu has ended her association with Nike | GETTYThe 23-year-old is set to showcase her new Uniqlo attire at the BNP Paribas Open in Indian Wells, California, which gets underway on March 4.Raducanu will be seeded at the tournament, earning her a bye into the second round.The British star will be hoping for an improved showing following a difficult recent spell on court.Last week she suffered defeat to Antonia Ruzic at the Dubai Championships, whilst her Qatar Open campaign ended prematurely when illness forced her to retire during the third set of her opening match against Camila Osorio.Raducanu finds herself among several prominent names either exiting or planning to leave Nike | GETTYDespite not reaching a Grand Slam quarter-final since her stunning New York victory five years ago, Raducanu continues to command significant commercial interest.The world number 25 boasts an impressive portfolio of blue-chip partnerships including Dior, Tiffany & Co, British Airways, Porsche and Wilson.Her social media presence remains formidable, with 2.9 million Instagram followers placing her second only to world number one Aryna Sabalenka among current WTA players.Raducanu’s appeal is particularly strong in East Asia, where Uniqlo is headquartered, owing to her Chinese mother and her frequent acknowledgement of the importance of her Asian heritage.