Jiri Lehecka knocked off top-seeded Spaniard Carlos Alcaraz on Thursday to advance to the semifinals of the Qatar ExxonMobil Open in Doha.

Jiri Lehecka notched his career-best victory at the ATP 500 event in Doha. The Czech faced world no.3 Carlos Alcaraz in the quarter-final and earned a 6-3, 3-6, 6-4 victory in two hours and nine minutes.

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.

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.

Jiri Lehecka produced one of the biggest wins of his career with a hard-fought success against Carlos Alcaraz at the Qatar Open.

After beating Croatian Marin Cilicby a double 6-4 in the first round of the ATP 500 tournament in Doha, and Italian Luca Nardi by 6-1, 4-6 and 6-3 in his next match, Carlos Alcaraz

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. Spain's Alcaraz, ranked No. 3 in the world,

Jiri Lehecka claimed the first Top 3 win of his career with a shock 6-3, 3-6, 6-4 win over Carlos Alcaraz to reach the semi-finals at the Qatar Open and continue his impressive start to the season.