Defending champion Daniil Medvedev reached the semi-finals of the Dubai Free Tennis Championships with a 6-2, 6-3 win over Alejandro Davidovich Fokina.
The World No. 4 will face either Hubert Hurkacz or Ugo Humbert in the last-four.
Elsewhere, second seed Andrey Rublev advanced to the semi-finals when American Sebastian Korda retired with injury.
Rublev was leading 6-4, 4-3 when Korda pulled out.
The World No. 5 Russian will play Kazakhstan's Alexander Bublik, whose opponent Jiri Lehecka retired on Thursday.
Bublik, seeded seventh, led 6-4, 4-1 when Lehecka withdrew from the the quarter-final match.
FIFA mandates female coaches in their women's competitions
Iran continuing World Cup preparations but will not play in US, says football president
Buttler hopeful of England return despite T20 World Cup struggles
Messi scores 900th career goal, joins Ronaldo in elite club
Bayern, Liverpool and Atletico join Barca in Champions League quarters
