Novak Djokovic impressed as he beat Tallon Griekspoor in straight sets to reach the Dubai Tennis Championships quarter-finals.
"It's been a great evening for me," said Djokovic.
The Serbian world number one will face fifth seed Hubert Hurkacz or Pavel Kotov on Thursday for a place in the semis.
Djokovic is chasing a sixth Dubai title and is playing his first tournament since winning the Australian Open with a hamstring injury last month.
Defending champion Andrey Rublev saved five match points and recovered from a set down to advance.