Top seed Kei Nishikori has crashed out of the Dubai Duty Free Tennis Championships.
The world number six from Japan went down in three sets to Poland's Hubert Hurkacz 5-7, 7-5, 2-6.
Elsewhere, Lithuania's Ričardas Berankis beat American Denis Kudla 6-4, 6-1.
Seven-time winner Roger Federer is in action later on Wednesday.
The Swiss star takes on Spain's Fernando Verdasco on Centre Court after 7 PM.