Clijsters, meanwhile, was also made to work hard in her quarterfinal but eventually edged a rollercoaster clash with Lucie Safarova 6-1 0-6 6-4 at the PatRafter Arena.
He lost twice in grand slam finals -- to compatriot PatRafter at the U.S. Open in 1998, before running into a young pretender called Roger Federer at Wimbledon in 2003.
Ferrero was also the key member of the Spanish team which won the Davis Cup for the first time in 2000, beating PatRafter and then Lleyton Hewitt to clinch the tie.