Career
2002-2004
Lapentti announced his Association of Tennis Professionals debut in 2002, but he actually had his first tour match in 2003, at the Franklin Templeton Classic in Scottsdale, Arizona, United States. Lapentti obtained his first professional victory at that tournament"s first round, defeating Paradorn Srichaphan, 7–6 (7–2), 6–2. He lost in the tournament"s second round to David Sánchez.
He participated in 2003"s Italian and French Open, losing in the first round both times.
During the French Open, he was tied at 2 sets apiece with Tommy Robredo but had to retire in the fifth set due to an injury, which did not allow him to return to the professional men"s tennis tour until 2004. Lapentti did not obtain a single victory during his second year as a professional, but he participated in tournaments held in Argentina, Mexico, Spain and Indian Wells, California.
The only tournament that he participated in and failed to reach the second round during 2005 was the Pacific Life Open in Indian Wells, where he lost to Kevin Kim. Lapentti was eliminated in the first round of 2006"s Pacific Life Open, that time by Mardy Fish.