Emma Navarro, an American, achieved a remarkable upset by defeating Australian Open champion Aryna Sabalenka to advance to the quarter-finals of the Indian Wells ATP-WTA Masters on Wednesday. Navarro, ranked 23rd in the world, secured her first career victory over a top-five player with a hard-fought 6-3, 3-6, 6-2 win. On her 20th birthday, US Open champion Coco Gauff celebrated with a dominant 6-0, 6-2 victory over Elise Mertens of Belgium.

In the men's competition, fourth-seeded Daniil Medvedev faced challenging conditions but managed to secure a 6-4, 6-4 victory over Grigor Dimitrov of Bulgaria. Medvedev will now face seventh-seeded Holger Rune, who overcame Taylor Fritz in a thrilling encounter. Rune's resilience was evident as he saved a match point and powered through the second-set tiebreaker to clinch a 2-6, 7-6 (7/2), 6-3 victory.

American Tommy Paul continued his impressive run by defeating Italian Luca Nardi 6-4, 6-3, ending Nardi's dream week, which included an upset victory over world number one Novak Djokovic. Paul will now face Casper Ruud, who staged a comeback to defeat Gael Monfils.

Navarro's triumph over Sabalenka sets up an intriguing clash with Maria Sakkari of Greece in the quarter-finals. Meanwhile, Gauff will face China's Yuan Yue in her next match. Sabalenka, on the other hand, faced disappointment after her early exit, following her challenging start to the season since her Australian Open triumph.

Thursday's quarter-finals will feature defending champion Carlos Alcaraz against Alexander Zverev, Australian Open champion Jannik Sinner against Jiri Lehecka, women's world number one Iga Swiatek against Caroline Wozniacki, and Anastasia Potopova against Marta Kostyuk of Ukraine.