Czech Wild card Jonas Forejtek dumped former world No.3 Marin Cilic out of the Sofia Open overnight in the first shock of the first round of the event.
Forejtek, 19, ranked 399 in the world, beat Cilic in straight sets 6-3 6-2, converting four of his five break points to beat Cilic in 66 minutes.
The young Czech came back from 40-0 down to break serve in the second game before Cilic broke straight back.
But Foretejk saved a break point in the seventh closed out the first set in the eighth.
Then second set went as the first, with Foretejk getting a double break, win the second and fourth games to win.