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.
Arsenal hammer Chelsea to move three points clear at top
Ruthless Arsenal threw down the gauntlet in the Premier League title race with a 5-0 thrashing of London rivals Chelsea to roar three points clear at the top of the table on Tuesday.
Al-Ain seal Asian Champions League final berth despite Al-Hilal loss
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Inter secure Serie A title in heated win over Milan
Inter Milan won their 20th Serie A title on Monday after a 2-1 win at AC Milan gave Simone Inzaghi's side an unassailable lead in the standings.
Bellingham's strike hands Real comeback win over Barcelona
LaLiga leaders Real Madrid's pursuit of a record-extending 36th Spanish title gathered momentum after Jude Bellingham scored a goal in added time to secure a 3-2 comeback win over Barcelona on Sunday.
Kohli unhappy with umpire after new full toss review method rules him out
Virat Kohli was left fuming when a new method applied to the ball tracking technology ruled him out on a full toss delivery that he thought went above his waist in Sunday's loss at Kolkata Knight Riders.
