Coria is into his first Grand Slam semi-final Men's quarter-finals photos

The Argentine came through 4-6 6-3 6-2 6-4 to set up a last-four meeting with Dutchman Martin Verkerk, who surprised Carlos Moya in the day's other quarter-final.

Coria broke serve first in all four sets and although Agassi fought back to take the opening set, it was the 21-year-old from Rufino who controlled the match from then on.

Watch day nine highlights

"That was really hard," Coria said afterwards. "Agassi is my childhood idol."

Four straight games saw Agassi fight back from 4-2 down in the first set and the American looked to be somewhere near his best form.

He deserved to win that match, he played good tennis Andre Agassi

The decisive moment of the match came in the second set when Agassi failed to convert two break points at 3-5, just as it looked as though another comeback was on the cards.

From then on it was Coria who looked the sharper and he was able to break almost at will.

A fourth set rally came too late for Agassi and Coria reached his first Grand Slam semi-final when the American put a forehand wide on match point.

HAVE YOUR SAY Coria has showed the world he can defeat an experienced player like Agassi. Juan Manuel, Argentina Join the debate

Coria came into the match in tremendous form, having reached two finals and won a Masters Series title in Hamburg already this year.

"It's a dream to get into the semis at Roland Garros," said Coria.

"I really wanted to win this one. I put all the tiredness behind me and fought for every point even if I messed up the first set."

Gamewatch: Coria v Agassi

The defeat ends Agassi's hopes of achieving the Grand Slam following his victory in Australia in January, and it is the third successive year he has lost in the quarter-finals at Roland Garros.

"He's a good mover, no question about it," said Agassi. "It gives him a lot of options in his game.

"He's a good decision-maker in the court. Today he was hitting a good variety of shots and executing real well.

"He deserved to win that match, he played good tennis. He's right up there with the best claycourters.