Sixth seed Viktor Troicki was knocked out of the Nastase Tiriac Trophy on Monday, losing to Spain's Daniel Gimeno-Traver on the first day of the tournament.

Gimeno-Traver, who was runner-up in the Grand Prix Hassan II earlier this month, beat Troicki 5-7, 6-3, 6-1 for his first win over the Serbian in four meetings.

Elsewhere, Malek Jaziri won three-quarters of his first service points to defeat Florian Mayer 4-6, 6-4, 7-5 in just over two hours.

Borna Coric and Mikhail Youzhny will meet later Monday.