Renzo Olivo has pulled off a major upset…

The 24-year-old Argentine tennis player saved two match points and went on to take down top-seeded Philipp Kohlschreiber in the German Open quarterfinals on Friday.

Olivo, currently listed as No. 153 in the ATP World Tour rankings, rallied to win 1-6, 6-0, 7-5, saving two match points in the ninth game of the final set as Kohlschreiber was serving for the match at 5-3.

In Olivo’s first career semifinal, he will have to stop third-seeded Pablo Cuevas of Uruguay.

Cuevas of Uruguay defeated Paul-Henri Mathieu 7-6 (7), 6-1 in a repeat of the 2009 semifinal that was won by Mathieu.

Cuevas, who won consecutive titles in Rio de Janeiro and Sao Paulo in February, fired 12 aces and won 79 percent of his service points to beat Mathieu.

Stephane Robert of France beat eighth-seeded Guillermo Garcia-Lopez of Spain 7-6 (4), 4-6, 6-3.

His semifinal opponent will be seventh-seeded Martin Klizan of Slovakia, who beat Daniel Gimeno-Traver of Spain 6-4, 6-3.