United Cup Prediction: Coco Gauff vs Solana Sierra
06:30 AM EST
The Line: Betting Odds: Coco Gauff -714 / Solana Sierra +450
Tournament Details
Tournament name: United Cup
Host cities: Perth, Sydney
Date: 2 – 11 January 2026
Field: 18 countries
Total prize money: $11,806,190
Coco Gauff vs Solana Sierra Preview
Coco Gauff returns to the United Cup for her second appearance. She made her debut in 2025 and was part of the winning team as the USA won its second United Cup title at the expense of Poland in the final. Gauff accounted for a massive win over WTA rival Iga Swiatek in the women’s singles before Taylor Fritz secured the title in the men’s singles match. Overall, she compiled a 5-0 record in the tournament, while also beating Donna Vekic, Leylah Fernandez, Shuai Zhang, and Karolina Muchova. She did not drop a set at the event.
Gauff went on to enjoy a Grand Slam-winning season, beating Aryna Sabalenka in the French Open final, while also succeeding the Belarusian as Wuhan Open champion later during the season. Gauff finished the year ranked World No. 3, but together with Taylor Fritz, will enter this year’s United Cup as the top-seeded nation. Will they add a third title?
Solana Sierra has already played a match in singles, beating Jessica Bouzas Maneiro in Argentina’s opening tie against Spain in the group. Team Argentina surprisingly won the tie after completing a sweep of the singles matches on Friday, with Sebastian Baez stunning Jaume Munar in straight sets.
Sierra, who sits in the world’s top 70, upstaged Bouzas Maneiro in three sets in a match that took 28 games to decide. She prevailed 6-4, 5-7, 6-0 in two hours and three minutes for a win on debut. Sierra hit 3 aces and 7 double faults in the victory. She landed 55% of first serves in play and won 65% of first serve points (31/48). Sierra won 56% of second serve points (22/39) and saved three of seven break points.
Coco Gauff vs Solana Sierra Head-To-Head
Gauff and Sierra have never met before this.
Coco Gauff vs Solana Sierra Prediction
Sierra bagged an impressive win over Bouzas Maneiro in the opening tie. But the serve remains an area of weakness. She hit 7 double faults and only landed 55% of first serves, while getting broken four times. Against Gauff, such numbers could prove to be her undoing. The American is one of the finest returners on tour and with a potent backhand that can turn any match on its head. Gauff also has a perfect record in United Cup matches and she should power the red, white, and blue to a commanding singles win.