World No 1 Carlos Alcaraz suffered a shock third-round defeat in the Italian Open at the hands of unheralded Hungarian Fabian Marozsan, losing 6-3, 7-6 (7/4) on Monday.
The 20-year-old Spaniard had come into the tournament on the back of wins in Barcelona and Madrid but was outplayed by Marozsan, who is ranked 135th in the world.
Marozsan, 23, won the final six points of the second-set tiebreaker to hand US Open champion Alcaraz a wake-up call with Roland Garros starting in less than a fortnight.
Marozsan, who next plays Borna Coric for a place in the quarterfinals, had not won a match on the ATP Tour prior to the tournament.
