Filippini became a professional tennis player in 1987 and won his first tournament on the ATP Tour the following year in Båstad . He also won at the side of Carlos di Laura at the tournament in Palermo . In 1989 he won his second individual title in Prague .
1990 was his most successful year; he was a finalist in Itaparica and reached the semi-finals in Båstad, Sanremo and San Marino . Although he could not book a tournament victory, he reached position 30, his highest ranking in the world rankings . In 1996 he played at the tournament in Casablanca against Alberto Berasategui, one of the longest games in the history of the ATP World Tour; it went through debut 20 times and lasted a total of 28 minutes.
Filippini won five ATP singles titles, five more times he was in a final. He also won three double tournaments. His best result in a Grand Slam tournament in individual, he achieved in 1999 at the French Open by reaching the quarter-finals. As a qualifier he defeated Greg Rusedski , among others , before losing to the eventual champion Andre Agassi .
Filippini played for the Uruguayan Davis Cup team between 1985 and 2001 . His record: 31:22 in singles and 11:14 in doubles. He was able to reach the first round of the world group three times with Uruguay; In 1990 the team was eliminated against Mexico , in 1992 against the Netherlands and in 1994 against Austria .