(Photo credit: Danielle Parhizkaran-USA TODAY Sports)
Unseeded Jakub Mensik of the Czech Republic recorded a 6-4, 7-6 (6) upset over top-seeded Andrey Rublev on Thursday to advance to the semifinals of the Qatar ExxonMobil Open in Doha.
Mensik, 18, reached his maiden tour-level semifinal after firing 10 aces to dispatch the Russian in 98 minutes. The victory over the World No. 5 marked Mensik's first Top 5 win in his car