No. 2-ranked Iga Swiatek lost to a player younger than 18 for the first time on tour when she was stunned by Mirra Andreeva in the Dubai Championships quarterfinals.

An inspired Mirra Andreeva beat world number two Iga Swiatek for the first time in her career with a dominant 6-3 6-3 victory as the Russian 17-year-old moved into the semi-finals of the Dubai Duty Free Championships on Thursday.

Mirra Andreeva upset Iga Swiatek in straight sets to become the youngest player to score five Top 10 wins and the youngest ever Dubai Duty Free Tennis Championships semifinalist.

Mirra Andreeva (No. 14 in the world) faces Iga Swiatek (No. 2) in the quarterfinals at the WTA Dubai, UAE.Andreeva beat Peyton Stearns 6-1, 6-1 on Wednesday in the Round of 16 in her

Mirra Andreeva delivered a huge performance to upset Iga Swiatek 6-3 6-3 and reach her first WTA 1000 semifinal in Dubai.th Last summer, the Russian fell just short of making her maiden WTA semifinal in Cincinnati after the Pole edged her out 4-6 6-3 7-5.

World number two Iga Swiatek falls to a shock defeat by Russian teenager Mirra Andreeva in the Dubai Tennis Championships quarter-finals.