Wild card Jonas Forejtek has knocked out former world No.3 Marin Cilic in the first round of the Sofia Open.

The Czech player, ranked 399th in the world, was a wildcard for the tournament but beat Cilic 6-3 6-2 to ensure his progress to the second round.

Forejtek converted four of his five break points to beat Cilic in just 66 minutes in his first match on the ATP Tour.

Adrian Mannarino recovered from a set down to progress through to the second round in a hard-fought 3-6 6-1 7-5 win over Martin Klizan.

Mannarino served 10 aces to book a date with Egor Gerasimov in the next round after he beat Viktor Troicki 6-3 3-6 6-3.

Marc-Andrea Hueslar saved two match points before beating seventh seed Nikoloz Basilashvili 6-1 4-6 7-6.

Vasek Pospisil saved eight out of 10 break points to beat Ilya Marchenko 6-2 5-7 7-6 and will face fourth seed Jan-Lennard Struff in the second round.

Salvatore Caruso came back from a set down to secure a 4-6 6-4 6-4 victory over Bulgarian wild card Dimitar Kuzmanov.

Australia’s Alex De Minaur is the tournament’s No.3 seed and will meet Russia’s Aslan Karatsev in the round of 16.

John Millman, who beat Adrian Andreev in straight sets in the first round, is waiting to play the winner of Gilles Simon and Andrej Martin.