The 31-year-old became the first Paraguayan to win on the Tour after holding his nerve in a four-way play-off that also included Henrik Stenson, Rafael Cabrera-Bello and Gregory Havret.

Zanotti hit seven birdies in his final round of 65 as overnight leader Pablo Larrazabal slipped seven spots down the standings with a 72, and there was even a hole-in-one from James Heath on the par-three 16th.

Stormy conditions - which had been forecast and led to the tee times being moved forward - added another dimension to an already tricky play-off but Zanotti, who finished 19 under for the tournament, emerged triumphant at the fifth extra hole after Stenson, the last of his challengers, found water off the tee before conceding.

A host of players had put themselves in contention for the crown and none finished more strongly than Spaniard Cabrera-Bello, who picked up four shots in the final three holes to keep his hopes alive.

Havret was the first to fall at the second additional hole as the Frenchman failed to recover after missing the fairway from the 18th tee.

The remaining three players struck birdies on the 17th before Cabrera-Bello, who missed an eagle attempt at the previous hole, hit the water going down 18, ending his chances.

It was on the 18th that Zanotti was crowned victor as Stenson suffered a disastrous final hole by first hitting water and then sand to hand his opponent a landmark win.