On Sunday evening, Thiem used every bit of his Grand Slam experience to come back from the brink and defeat Zverev 2-6, 4-6, 6-4, 6-3, 7-6 in the 2020 US Open men's singles final.
On the first day of the US Open, Naomi Osaka came on to court wearing a face mask with the name Breonna Taylor written across it.
The second seeded Austrian beat the fifth seed 2-6, 4-6, 6-4, 6-3, 7-6 (8/6) in 4hr 2min inside a near-empty Arthur Ashe Stadium.
Osaka won her third career Grand Slam title after securing a win over Victoria Azarenka in the final of the US Open.
Osaka, of Japanese and Haitian heritage, wore different masks honoring victims of systemic racism and police brutality in the United States in each of the tournament's seven rounds.
Osaka, the fourth seed, overcame her unseeded opponent 1-6, 6-3, 6-3 inside a near-empty Arthur Ashe Stadium at Flushing Meadows.
Serena Williams was beaten in the finals of four of the preceding seven Slams, including at Flushing Meadows in 2018 and 2019.
The match was played with the retractable cover at Arthur Ashe Stadium shut, and rain loudly pelted the roof.
Jennifer Brady notched the biggest victory yet in her breakout run at the US Open, beating Yulia Putintseva 6-3, 6-2.
She's done nothing wrong at all: Novak Djokovic in support for US Open official after fans criticize her
While Novak Djokovic didn't attend the post-match interaction, he did take to social media to apologise after the incident.
Serena Williams, who turns 39 in less than three weeks, will face unseeded Tsvetana Pironkova for a semifinal berth.
World No 93 Shelby Rogers continued her stellar campaign at the ongoing US Open as she defeated No 6 seed Petra Kvitova.
Kristina Mladenovic and Timea Babos were supposed to play their second-round match against Gabriela Dabrowski and Alison Riske.
Former WTA world number one Serena Williams collected 10 of the last 12 games by lifting her level, to be sure.
Bopanna and Shapovalov will take on Dutch-Romanian combination of Jeal-Julien Rojer and Horia Tecau in the US Open quarters.