Top-seeded Carlos Alcaraz lost for just the second time this year on Thursday when 25th-ranked Jiri Lehecka beat him 6-3, 3-6, 6-4 in the quarterfinals of the Qatar Open.
Montreal's Felix Auger-Aliassime advanced to the quarterfinals of the Qatar Open tennis tournament Wednesday when second-round opponent Hamad Medjedovic withdrew with a right leg injury.