Kontaveit is a big favorite to defeat Teichmann on Wednesday, but we think the Estonian could be in for a tough match.

And before the world No. 1 was ousted in Warsaw, the world No. 2—Anett Kontaveit—fell to Anastasia Potapova in Prague.

The Russian, who has not lost a set at the hard-court tournament so far, will next face China's Qiang Wang in the semifinals.

If Atlanta is a preview of the next few months in men’s tennis, Umag might give us a sneak peak at the next decade.

The 27-year-old got some revenge on Saturday, too, having lost to the world No. 2 in the opening round of Wimbledon last month.

The Estonian recently won the pair's opening round at Wimbledon.

The world No. 2 swapped places with Martin Järveoja ahead of the motorsport event while getting Pierre-Louis Loubet on the court for a fun practice.

"I slightly twisted my ankle when I fell during my quarterfinal and as a precaution, we decided it was the best to take some more time before my next event in Umag," said Sinner.

The Estonian was playing her first tournament since Roland Garros and spoke about her COVID-19 struggles earlier this month.

The two began working together in 2021, during which time the Estonian has enjoyed the best results of her career, culminating with a rise to No. 2 in the WTA rankings on Monday.