|File:N Lapentti 2009 Davis Cup 1.jpg|
13 August 1976|
|Height||Script error: No such module "convert".|
|Retired||18 January 2011|
|Plays||Right-handed (two-handed backhand)|
|Career record||317–287 (at ATP Tour level, Grand Slam level, and in Davis Cup)</td></tr>|
|Highest ranking||No. 6 (22 November 1999)</td></tr>|
|Grand Slam Singles results</tr>|
|Australian Open||SF (1999)</td></tr>|
|French Open||4R (2000)</td></tr>|
|US Open||3R (2001)</td></tr>|
|Tour Finals||RR (1999)</td></tr>|
|Olympic Games||1R (1996, 2004, 2008)</td></tr>|
|Career record||153–159 (at ATP Tour level, Grand Slam level, and in Davis Cup)</td></tr>|
|Highest ranking||No. 32 (10 May 1999)</td></tr>|
|Grand Slam Doubles results</tr>|
|Australian Open||QF (1999, 2001, 2003)</td></tr>|
|French Open||QF (1998)</td></tr>|
|US Open||3R (2003)</td></tr>|
Lapentti began playing tennis at the age of six.
He first came to the tennis world's attention an outstanding junior player who won the Orange Bowl in Florida in 1994, when he also captured the junior doubles titles at the French Open (partnering with Gustavo Kuerten) and the US Open.
Lapentti turned professional in 1995 and won his first top-level singles title later that year at Bogotá.
In 1999, Lapentti was a semi-finalist at the Australian Open. He also won two tour singles titles that year and reached his career-high singles ranking of World No. 6 that November.
In 2002, Lapentti won his fifth tour singles title at St Pölten, beating Fernando Vicente in straight sets in the final. In the second round of that tournament, his rival, Irakli Labadze, faced four match points but was not able to convert any of them. Lapentti finally won that tough match 5–7, 7–6(1), 7–6(6).
His brother, Giovanni, is also a professional tennis player, reaching a career-high singles ranking of World No. 110 in May 2005. In addition, another brother, Leonardo, has been active at the lower levels of professional tennis.
In the Cincinnati Open 2008, Lapentti defeated David Ferrer in second round, Fernando Verdasco in the third round and faced No. 2 seed Rafael Nadal in the quarterfinals where he lost in straight sets. With that victory over Lapentti, Nadal clinched the World No. 1 ranking for the first time.
He has also been a member of the Ecuador Davis Cup team since 1993. Representing his country in Davis Cup since he was 17, and won the deciding rubber against Great Britain (July 2000) to put Ecuador in the World Group. Moreover, he owns the Davis Cup record for most matches won in five sets, with a total of 13 victories.
Singles: 12 (5–7)
Doubles: 7 (3–4)
1997—Amsterdam, Mexico City; 1999—Adelaide
1996—Bogotá; 1997—Santiago; 1999—Prague; 2004—Viña del Mar