Luis Horna Biscari (; born 14 September 1980, in Lima) is a former tour professional tennis player from Peru, who turned professional in 1998. Known by his nickname "Lucho", he won 2 career singles titles, reached the quarterfinals of the 2004 Madrid Masters and achieved a career-high singles ranking of World No. 33 in August 2004. Together with Pablo Cuevas, Horna also won the men's doubles at the 2008 French Open. At the 2003 French Open, he defeated Roger Federer in the first round. Career Juniors Horna was an outstanding junior player, reaching as high as No. 4 in the world in singles 1997 (and No. 3 in doubles). He made the final of the boys singles at the French Open in 1997 losing to Daniel Elsner. Horna won the French Open and Wimbledon doubles with José de Armas and Nicolás Massú respectively. 1998–2001 Horna turned professional in 1998 and he moved up over 1,000 places in the rankings with victories in the Ecuadorian, where he defeated Sergio Roitman as a qualifier and three Futures events in Peru and in 1999 made his first ATP Challenger final in Aschaffenburg. In 2000 he was finalist in Salinas and again in Aschaffenburg and it was not until 2001 that Horna was able to get his first win on the ATP tour in Umag defeating Martin Damm. He also made another Challenger final in Curitiba losing to Flávio Saretta. 2002–2004 2002 was a successful year for Horna when he became the first Peruvian since Jaime Yzaga to finish in the top 100 in the end of season rankings, who finished 34th in 1994. This was achieved through winning three Challenger titles in Zagreb, Fürth, and Weiden defeating Dominik Hrbatý, Jürgen Melzer and Zeljko Krajan respectively and finalist in the São Paulo Challenger losing to Franco Squillari. Horna made his debut in the four Grand Slam events in 2003. At the French Open, Horna defeated Roger Federer who was the fifth pre-tournament favourite and was the last time that Federer lost in the first round of a Grand Slam event. At the time Horna said after the victory that it was "the best feeling I have had in my whole life". Horna lost his second round match after having a match point against eventual finalist Martin Verkerk. He won another Challenger title in Seville and was a three time semi finalist in Amersfoort, Sopot