The semifinals are set and just a handful of players remain unscathed in Dubai. As the matchups dwindle, the heat of the action continues to rise.
These are the Top 5 photos that sum up Thursday's action. (All photos Getty).
Can anyone believe just 12 tournaments ago, Karatsev was ranked No. 253? The Russian came out of nowhere by running through qualifying and into the Australian Open's semifinals. He now holds a 13-0 record this season against players not named Novak Djokovic or Dominic Thiem. Karatsev defeated Dubai's No. 16 seed Jannik Sinner, 6-7 (5), 6-3, 6-2, to reach the last four.