Mensik upsets Sinner in Doha, sets SF with Fils
DOHA: Jakub Mensik caused a major upset in the Qatar Open when the 20-year-old stunned World No. 2 Jannik Sinner in the quarterfinal of the ATP 500 event.
Mensik beat Sinner 7-6(3), 2-6, 6-3 for the biggest win of his career by ATP…