| Men's singles | |
|---|---|
| 2001 Estoril Open | |
| Champion |  Juan Carlos Ferrero |
| Runner-up | Félix Mantilla |
| Score | 7–6(7–3), 4–6, 6–3 |
| Draw | 32 |
| Seeds | 8 |
This tournament took place between April 9 and 15, 2001.
Carlos Moyá was the defending champion but did not compete that year.
Juan Carlos Ferrero won in the final 7–6(7–3), 4–6, 6–3 against Félix Mantilla.
Juan Carlos Ferrero (champion)
Tim Henman (second round)
Dominik Hrbatý (quarterfinals)
Franco Squillari (quarterfinals)
Andrei Pavel (semifinals)
Michael Chang (first round)
Nicolás Lapentti (first round) Albert Costa (first round)| Semifinals | Final | ||||||||||||
| 1 | Juan Carlos Ferrero | 6 | 6 | ||||||||||
| Albert Portas | 3 | 1 | |||||||||||
| 1 | Juan Carlos Ferrero | 77 | 4 | 6 | |||||||||
| Q | Félix Mantilla | 63 | 6 | 3 | |||||||||
| 5 | Andrei Pavel | 2 | 6 | 2 | |||||||||
| Q | Félix Mantilla | 6 | 3 | 6 | |||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | J C Ferrero | 6 | 77 | ||||||||||||||||||||||||
 H Levy | 3 | 62 | 1 | J C Ferrero | 6 | 6 | |||||||||||||||||||||
 C Doseděl | 6 | 6 | C Doseděl | 3 | 0 | ||||||||||||||||||||||
| WC |  E Couto | 3 | 4 | 1 | J C Ferrero | 6 | 6 | ||||||||||||||||||||
| K Kučera | 6 | 77 | Q | A Montañés | 2 | 4 | |||||||||||||||||||||
 N Davydenko | 3 | 63 | K Kučera | 3 | 3 | ||||||||||||||||||||||
| Q | A Montañés | 6 | 6 | Q | A Montañés | 6 | 6 | ||||||||||||||||||||
| 6 | M Chang | 1 | 3 | 1 | J C Ferrero | 6 | 6 | ||||||||||||||||||||
| 3 | D Hrbatý | 6 | 7 | A Portas | 3 | 1 | |||||||||||||||||||||
| M Youzhny | 1 | 5 | 3 | D Hrbatý | 6 | 6 | |||||||||||||||||||||
| WC | T Sousa | 5 | 4 |  J Siemerink | 1 | 3 | |||||||||||||||||||||
| J Siemerink | 7 | 6 | 3 | D Hrbatý | 2 | 4 | |||||||||||||||||||||
 G Pozzi | 3 | 6 | 3 | A Portas | 6 | 6 | |||||||||||||||||||||
| A Portas | 6 | 4 | 6 | A Portas | 62 | 6 | 6 | ||||||||||||||||||||
| G Coria | 711 | 6 | G Coria | 77 | 4 | 1 | |||||||||||||||||||||
| 7 | N Lapentti | 69 | 0 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 5 | A Pavel | 6 | 6 | ||||||||||||||||||||||||
| Q |  X Malisse | 1 | 1 | 5 | A Pavel | 6 | 6 | ||||||||||||||||||||
| Q | J A Viloca | 2 | 64 | D Sánchez | 4 | 1 | |||||||||||||||||||||
| D Sánchez | 6 | 77 | 5 | A Pavel | 78 | 78 | |||||||||||||||||||||
| M Tabara | 3 | 4 | WC/4 | F Squillari | 66 | 66 | |||||||||||||||||||||
| A Martín | 6 | 6 | A Martín | 3 | 6 | 3 | |||||||||||||||||||||
| C Rochus | 4 | 63 | WC/4 | F Squillari | 6 | 2 | 6 | ||||||||||||||||||||
| WC/4 | F Squillari | 6 | 77 | 5 | A Pavel | 2 | 6 | 2 | |||||||||||||||||||
| 8 | A Costa | 4 | 2 | Q | F Mantilla | 6 | 3 | 6 | |||||||||||||||||||
 M Hipfl | 6 | 6 | M Hipfl | 5 | 6 | 6 | |||||||||||||||||||||
| J Balcells | 6 | 3 | J Balcells | 7 | 4 | 0 | |||||||||||||||||||||
 A Medvedev | 2 | 0r | M Hipfl | 6 | 3 | 1 | |||||||||||||||||||||
| J Novák | 6 | 4 | 3 | Q | F Mantilla | 3 | 6 | 6 | |||||||||||||||||||
| Q | F Mantilla | 4 | 6 | 6 | Q | F Mantilla | 7 | 6 | |||||||||||||||||||
| S Koubek | 4 | 1 | 2 | T Henman | 5 | 1 | |||||||||||||||||||||
| 2 | T Henman | 6 | 6 | ||||||||||||||||||||||||
Nicolás Massú was the defending champion, but chose not to participate that year.
Luis Horna was the defending champion, but retired due to a right leg injury, in the first round against Gastón Gaudio.
In the singles event at the 2008 Heineken Open tennis tournament in Auckland, New Zealand, David Ferrer was the defending champion, but lost in the quarterfinals to Julien Benneteau.
Andrei Pavel defeated Patrick Rafter in the final, 7–6(7–3), 2–6, 6–3 to win the men's singles tennis title at the 2001 Canadian Open.
Juan Carlos Ferrero was the defending champion but lost in the semifinals to Fernando Verdasco.
Max Mirnyi was the defending champion but lost in the semifinals to Juan Carlos Ferrero.
Juan Carlos Ferrero defeated Gustavo Kuerten in the final, 3–6, 6–1, 2–6, 6–4, 6–2 to win the men's singles tennis title at the 2001 Italian Open.
Juan Carlos Ferrero defeated Carlos Moyá in the final, 7–5, 6–3, 6–4 to win the singles tennis title at the 2002 Monte Carlo Masters.
Tommy Robredo was the defending champion, but chose to compete in Marseille instead.
Nicolás Almagro was the defending champion; however, he lost 1–6, 7–5, 2–6 to Juan Carlos Ferrero in the quarterfinals.
David Ferrer won in the final 6–3, 3–6, 6–1 against Juan Carlos Ferrero.
Nicolas Kiefer was the defending champion but lost in the first round to Patrick Rafter.
The singles competition of the 2001 Open SEAT Godó tennis tournament was held in April 2001. Marat Safin was the defending champion but did not compete that year.
Àlex Corretja was the defending champion but lost in the semifinals to Jiří Novák.
Nicolas Kiefer was the defending champion but did not compete that year.
Marat Safin was the defending champion and won in the final 3–6, 6–3, 6–3 against Rainer Schüttler.
Juan Carlos Ferrero was the defending champion but lost in the second round to David Nalbandian.
Marcelo Ríos was the defending champion but did not compete that year.
Roger Federer was the defending champion but lost in the first round to Franco Squillari.
Taylor Dent won in the final 6–3, 7–6(7–5) against Juan Carlos Ferrero.
Feliciano López was the defending champion but lost to Radek Štěpánek in the quarterfinals.