Popp's career highlights are making the quarterfinals of Wimbledon (by far his most successful tournament) in 2000 (defeating Gustavo Kuerten and Michael Chang en route), and in 2003 (defeating Jiří Novák).
He had the misfortune of having to face reigning champion Gustavo Kuerten at the 1998 French Open and lost in straight sets.
Pognon represented his native country at the 2000 Summer Olympics in Sydney, Australia, where he was defeated in the first round by Brazil's Gustavo Kuerten.
Canada is 5–0 all time in the Corral, including a thrilling upset of Brazil, and former #1 player Gustavo Kuerten in 2003.
Gustavo Kuerten | Gustavo Bergalli | Gustavo Rowek | Gustavo Garzón | Gustavo Santaolalla | Gustavo Rojas Pinilla | Gustavo Machado | Gustavo Dudamel | Gustavo Chacín | Gustavo Romano | Gustavo Palafox | Gustavo Napoles | Gustavo Madero Muñoz | Gustavo Esteva | Gustavo Díaz Ordaz | Gustavo Cochet | Gustavo Cadile | Gustavo Arias Murueta | R. P. Gustavo Le Paige Archaeological Museum | José Gustavo Guerrero | Gustavo Santander | Gustavo Sánchez Martínez | Gustavo Rojas Pinilla International Airport | Gustavo Ponza di San Martino | Gustavo Moncayo | Gustavo Martínez Zuviría | Gustavo Gorriti | Gustavo Fuertes | Gustavo Espinoza | Gustavo Díaz Ordaz, Tamaulipas |
This was arguably the strongest year of his career, in which he reached the second rounds of the French Open (l. to Gustavo Kuerten) and Wimbledon (l. to Ivo Karlović), and won the challengers of Heilbronn and Sarajevo.
Among the many notable players he beat on the ATP Tour are former World No. 1s Andre Agassi, Jim Courier, Gustavo Kuerten, Juan Carlos Ferrero, Marcelo Ríos and Carlos Moyá, as well as Grand Slam champions Richard Krajicek, Goran Ivanišević, Albert Costa, Gastón Gaudio, Thomas Johansson and Michael Chang.