Stan Wawrinka claimed a comfortable 6-3 6-4 victory over Jeremy Chardy to reach the quarter-finals of the Qatar Open on Tuesday.

In his first match of 2020, top seed Wawrinka saved six of the seven break points he faced and came from 0-3 down in the second set to book a meeting with Aljaz Bedene, who overcame Alexander Bublik 6-3 7-5.

Laslo Djere defeated Lorenzo Sonego 6-1 3-6 6-2 and Mikhail Kukushkin downed Malek Jaziri 6-0 6-3, earning a clash with second seed Andrey Rublev in round two.

Wawrinka's doubles partner Frances Tiafoe – seeded eighth in the singles – lost 6-4 4-6 6-4 to Marton Fucsovics, while Pierre-Hugues Herbert and Cem Ilkel also progressed.