Jiri Lehecka knocked off top-seeded Spaniard Carlos Alcaraz on Thursday to advance to the semifinals of the Qatar ExxonMobil Open in Doha. The 23-year-old Czech trailed 4-2 in the third set before rallying to win 6-3,

Carlos Alcaraz was the top favorite to win the Doha ATP 500 this week, but his run in Qatar ended already in the quarterfinals against Jiri Lehecka. The young Spanish ace unleashed a performance full of ups and downs, falling back on the mistakes of the past and showing that he can still improve a lot in the management of matches.

Top seed Carlos Alcaraz withstood a charge from qualifier Luca Nardi for a 6-1, 4-6, 6-3 victory in the second round of the Qatar ExxonMobil Open in Doha on Wednesday.

World No. 3 Carlos Alcaraz found himself trailing in the second set to Croatia's Marin Cilic, but battled back for a 6-4, 6-4 win Monday in the opening round at the Qatar ExxonMobil Open in Doha.