Iga Świątek booked her place in the semifinals of this year’s Australian Open after thrashing American star Emma Navarro on Tuesday, but the match wasn’t without its controversy.

Iga Świątek has been bundled out of the Australian Open in the semi-finals at the hands of Madison Keys. The Polish star suffered a shock 5-7 6-1 7-6(8) loss to the American, who reached her second career grand slam final.

A missed double-bounce call, an unseeded Italian hits one of the shots of his life and an all-Australian final is locked in. Here are five quick hits from day 11 of the Australian Open.

It's an up-and-down day for favorites and the husband-and-wife duo of Gaël Monfils and Elina Svitolina wo their singles matches.

The final match of the day saw American Learner Tien, playing in his first major outside of the U.S. Open, upset No. 5 seed Daniil Medvedev in a five-set classic, 6-3, 7-6, 6-7, 1-6, 7-6, that ended at 2:54 a.m. local time. Medvedev had reached three of the past four Australian Open finals, but could not fend off a ferocious Tien.

An American woman is a champion once again. After having to face the two best players in the world -- Iga Switaek and Aryna Sabalenka -- Madison Keys has claimed her first Grand Slam title at the Australian Open. Keys outlasted Sabalenka in the final on Saturday over three sets to accomplish the feat.

Poland's top tennis player, Iga Świątek, defeated Germany’s Eva Lys 6–0, 6–1 in the round of 16 at the Australian Open, easily advancing to the quarterfinals of the Grand Slam tournament in Melbourne.

Iga Świątek's run hasn't been without controversy, including one call in her quarter-final win over Emma Navarro that left the tennis world scratching their heads.

Madison Keys pulled off a stunning victory, while Jannik Sinner charged to a convincing title defense. Plus, Paula Badosa and Ben Shelton impressed Down Under.

World No. 2 Iga Świątek defeated American Emma Navarro to advance to the semifinals of the Grand Slam tennis tournament in Melbourne. Her next opponent will be fellow American Madison Keys.

Madison Keys was a tennis prodigy, beating Serena Williams when she was just 14 years old, but had not won a grand slam title in her 15 year career.