| 5 Feb | Davis Cup by BNP Paribas First Round Perth, Australia – grass Rio de Janeiro, Brazil – clay Helsingborg, Sweden – carpet Bratislava, Slovakia – hard Ghent, Belgium – clay Basel, Switzerland – hard Braunschweig, Germany – carpet Eindhoven, Netherlands – carpet | First-round winners 4–1 4–1 3–2 3–2 5–0 3–2 3–2 4–1 | First-round losers
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| 12 Feb | 2001 [Copenhagen Open] Copenhagen, Denmark ATP International Series $350,000 – hard Singles – Doubles | 
March| Week | Tournament | Champions | Runners-up | Semifinalists | Quarterfinalists | | 5 Mar | 2001 [Delray Beach International Tennis Championships|Delray Beach International Tennis Championships] Delray Beach, USA ATP International Series $350,000 – hard Singles – Doubles | 
Statistical informationList of players and titles won, listed in order of most titles won:
- Lleyton Hewitt – Sydney, London Queen's Club, 's-Hertogenbosch, US Open, Tokyo and Masters Cup
- Gustavo Kuerten – Buenos Aires, Acapulco, Monte Carlo Masters, French Open, Stuttgart Outdoor and Cincinnati Masters
- Andre Agassi – Australian Open, Indian Wells Masters, Miami Masters and Los Angeles
- Juan Carlos Ferrero – Dubai, Estoril, Barcelona and Rome Masters
- Tommy Haas – Adelaide, Long Island, Vienna and Stuttgart Masters
- Andy Roddick – Atlanta, Houston and Washington, D.C.
- Andrea Gaudenzi – St. Poelten and Båstad
- Tim Henman – Copenhagen and Basel
- Thomas Johansson – Halle and Nottingham
- Yevgeny Kafelnikov – Marseille and Moscow
- Jiří Novák – Munich and Gstaad
- Marcelo Ríos – Doha and Hong Kong
- Marat Safin – Tashkent and St. Petersburg
- Guillermo Cañas – Casablanca
- Francisco Clavet – Scottsdale
- Guillermo Coria – Viña del Mar
- Àlex Corretja – Amsterdam
- Younes El Aynaoui – Bucharest
- Nicolas Escudé – Rotterdam
- Roger Federer – Milan
- Jan-Michael Gambill – Delray Beach
- Neville Godwin – Newport
- Sébastien Grosjean – Paris Masters
- Dominik Hrbatý – Auckland
- Goran Ivanišević – Wimbledon
- Nicolás Lapentti – Kitzbühel
- Ivan Ljubičić – Lyon
- Félix Mantilla – Palermo
- Alberto Martín – Mallorca
- Carlos Moyà – Umag
- Andrei Pavel – Canada Masters
- Mark Philippoussis – Memphis
- Albert Portas – Hamburg Masters
- Patrick Rafter – Indianapolis
- Tommy Robredo – Sopot
- Greg Rusedski – San Jose
- Sjeng Schalken – Stockholm
- Rainer Schüttler – Shanghai
- Michal Tabara – Chennai
- Jan Vacek – Salvador
- Fernando Vicente – Bogotá
The following players won their first title: Titles won by nation:
- Spain 12
- Australia 8
- United States 8
- Brazil 6
- Germany 5
- Czech Republic 4
- Russia 4
- United Kingdom 3
- Argentina 2
- Chile 2
- Croatia 2
- France 2
- Italy 2
- Sweden 2
- Ecuador 1
- Morocco 1
- Netherlands 1
- Romania 1
- Slovakia 1
- South Africa 1
- Switzerland 1
RetirementsFollowing is a list of notable players or top 50 who announced their retirement from professional tennis, became inactive, or were permanently banned from playing, during the 2001 season:
- Julián Alonso He turned professional in 1996 and reached his career-high ranking of no. 30 in 1998. He earned two career titles.
- Alberto Berasategui He turned professional in 1991 and reached a career-high ranking of world no. 7. He reached the final of the French Open in 1994 and the quarterfinals of the Australian Open. He earned 14 ATP titles. He played his last career match in Barcelona in March against Álex Calatrava
- Tomás Carbonell His highest singles ranking was world no. 40. He earned two singles titles and 22 doubles titles. His career-high doubles ranking was no. 22, and he twice reached the semifinals of the French Open. He played his last career match in Lyon in October partnering Lucas Arnold Ker.
- Filip Dewulf He turned professional in 1990 and reached his career-high ranking of world no. 39 in 1997. He earned two career ATP titles and played his last match in Magdeburg, Germany in March against Michaël Llodra.
- Ctislav Doseděl He turned professional in 1989 and reached his career-high ranking of no. 26 in 1994. He reached the quarterfinals of the US Open in 1999 and earned three career singles titles and one doubles title.
- Hernán Gumy He turned professional in 1991 and reached his career-high ranking of no. 39 in 1996. He earned one career title and played his last match in Biella, Italy in June against Solon Peppas.
- Sébastien Lareau He turned professional in 1991 and reached his highest doubles ranking of world no. 4 in 1999. He earned 17 doubles titles and an Olympic gold medal in 2000. His last career match was at the US Open partnering Ben Ellwood.
- Andriy Medvedev He turned professional in 1991 and reached a career-high ranking of world no. 4. He won 11 career ATP titles and was a finalist at the French Open in 1999, a semifinalist at the year-end finals in 1993, and a quarterfinalist at the Australian and US Opens. In all, he won 19 career doubles titles. He played his last career match in St. Petersburg in October against Stefan Koubek.
- Piet Norval He turned professional in 1988 and reached a career-high doubles ranking of world no. 16 in 1995. He was a semifinalist at Wimbledon and a quarterfinalist at the three other Grand Slam tournaments. He also won the year-end doubles finals in 2000 and a silver medal at the 1992 Olympics. He earned a total of 14 doubles ATP titles. His last match was at the Australian Open partnering Donald Johnson.
- Jaime Oncins He turned professional in 1988 and reached his career-high ranking of world no. 34 in 1993. He earned two career singles ATP titles and five doubles titles. His highest doubles ranking was no. 22. His final singles and doubles matches were both in Brazil in September.
- Francisco Roig, who had retired from singles two years prior, officially retired from doubles at the close of the 2001 season. Nevertheless, his final professional match would take place in 2014.
- Jonathan Stark He turned professional in 1991 and reached a career-high ranking of world no. 36, earning two singles titles. In doubles, he was ranked world no. 1. He won the French Open in 1994, was a semifinalist at the Australian Open, and a quarterfinalist at Wimbledon and the US Open. He played his last career singles match in June in Nottingham and his last career doubles match in October in St. Petersburg partnering Justin Gimelstob.
- Jason Stoltenberg He turned professional in 1987 and reached a career-high ranking of world no. 19 in 1994. He reached the semifinals at Wimbledon in 1996 and earned four career singles titles. In doubles, he reached a career-high ranking of no. 23 in 1991 and earned five career titles. He played his last career match at Wimbledon against Juan Carlos Ferrero. He had a brilliant Juniors career, winning the Australian Open, being a finalist at the French Open and Wimbledon, and a semifinalist at the US Open, all in 1987. He is perhaps the only player on tour to have gotten started in tennis playing on a crushed termite mound court.
- David Wheaton He turned professional in 1988 and reached his career-high singles ranking of world no. 12 in 1991. He reached the semifinals at Wimbledon in 1991 and the quarterfinals of the Australian Open and the US Open in 1990. He earned three career singles titles. In doubles, he was ranked no. 24 in 1991 and earned three titles. He played his last career match in Knoxville, Tennessee, in November partnering Eric Taino.
- Chris Woodruff He turned professional in 1993 and reached his highest career ranking of world no. 29 in 1997. He reached the quarterfinals of the Australian Open in 2000 and earned two career titles. He played his last career match in Tyler, Texas, in November against Gabriel Trifu.
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