Casanova scored the first World Cup points on January 18, 1998 as 18th in the Veysonnaz slalom . In the same year he also took part in the Winter Olympics in Nagano , where he could not classify. He achieved the best World Cup result on March 13, 1999 in the Sierra Nevada when he finished third in the slalom. In the following years Casanova established himself in midfield, but only once managed to place in the top ten. At the end of the 2003/04 season he announced his retirement from top-class sport.