He was defeated by Andre Agassi in the quarterfinals, but had lost just one set until that stage. In July, he defeated Sébastien Grosjean 9–7 in the fifth set of the 1999 Davis Cup quarterfinal between Brazil and France. That match lasted 4 hours and 43 minutes. He also became the first Brazilian to qualify for the ATP Tennis Masters Cup, today known as the ATP World Tour Finals, winning a match but failing to get past round robin. After another solid clay court swing, Kuerten won his second French Open title by defeating Magnus Norman (who had beaten him a few weeks earlier in the final of the Rome Masters) on his 11th match point. Kuerten became the first South American to finish the year as World No. 1 in the history of the ATP rankings (since 1973). It was a close contest with young up-and-comer Marat Safin at the year's last event, the Tennis Masters Cup (in its first year under that name) in Lisbon, Portugal, with one loss meaning that Safin would have been No. 1. Despite Safin having 4 chances to finish the year as world No. 1, Kuerten defied all odds and finished the year at No. 1 by beating Pete Sampras and Andre Agassi in back-to-back matches on an indoor hard court. He broke an eight-year hold of players from the U.S. on the year-end No. 1 position. He also became the first South American to finish in Top 5 in consecutive years since Guillermo Vilas of Argentina in 1977–78. In 2001, he won his third French Open crown, joining former greats Björn Borg (6), Ivan Lendl (3) and Mats Wilander (3) with three or more French Open titles in the Open Era; former champion Jim Courier presented him with the trophy. His road to the title saw him save a match point against fourth round opponent Michael Russell. He also won the biggest hardcourt title of his career in August at the Cincinnati Masters, where he defeated Patrick Rafter in the final. At the US Open he was seeded first but lost in the quarterfinals in straight sets to seventh-seeded Yevgeni Kafelnikov. Injuries started to plague Kuerten as he lost 8 of the next 9 matches to conclude the year. Despite being the favorite to finish as world No. 1 for the second consecutive year, his poor season ending showing saw Lleyton Hewitt overtake him.