[2] In 1994 he upset world number 11 Magnus Gustafsson at the Philips Open in Nice, en route to the quarterfinals, where he lost to Slava Doseděl.

[2] The biggest win however was over four-time Grand Slam champion Jim Courier in the first round of the 1995 Italian Open, one of that year's ATP Super 9 tournaments.

[2] Guardiola reached the second round of the 1995 Australian Open, defeating Jason Stoltenberg, the world number 20.

[2] He managed to make the second round again in the 1995 French Open but never won another Grand Slam match.

[2] In his remaining three Grand Slams he had the misfortune of having to start the tournaments against two third seeds (Thomas Muster and Magnus Norman) and at the 2000 US Open had to play eventual champion Marat Safin.