| Singles | |
|---|---|
| 1991 KAL Cup Korea Open | |
| Champion |  Patrick Baur |
| Runner-up |  Jeff Tarango |
| Score | 6–4, 1–6, 7–6(7–5) |
| Draw | 32 |
| Seeds | 8 |
Alex Antonitsch was the defending champion, but he lost in the quarterfinals this year.
Patrick Baur won the tournament, beating Jeff Tarango in the final, 6–4, 1–6, 7–6(7–5). [1]
Jan Siemerink (semifinals)
Alex Antonitsch (semifinals) Jim Grabb (first round) Richard Krajicek (quarterfinals) Alexander Mronz (first round)
Gilad Bloom (semifinals)
Grant Connell (first round) Patrik Kühnen (first round)| Semifinals | Final | ||||||||||||
 Shuzo Matsuoka | 66 | 2 | |||||||||||
| Patrick Baur | 78 | 6 | |||||||||||
| Patrick Baur | 6 | 1 | 77 | ||||||||||
| Jeff Tarango | 4 | 6 | 65 | ||||||||||
| Jeff Tarango | 2 | 7 | 6 | ||||||||||
 Luis Herrera | 6 | 5 | 3 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | J Siemerink | 6 | 2 | 6 | |||||||||||||||||||||||
| Q |  N Brown | 4 | 6 | 2 | 1 | J Siemerink | 3 | 77 | 6 | ||||||||||||||||||
| K Braasch | 6 | 6 | K Braasch | 6 | 63 | 3 | |||||||||||||||||||||
| A Sznajder | 1 | 1 | 1 | J Siemerink | 6 | 2 | 4 | ||||||||||||||||||||
| Q |  Ģ Dzelde | 6 | 6 | S Matsuoka | 4 | 6 | 6 | ||||||||||||||||||||
| Q |  P Wekesa | 4 | 4 | Q | Ģ Dzelde | 2 | 1 | ||||||||||||||||||||
| S Matsuoka | 7 | 4 | 6 | S Matsuoka | 6 | 6 | |||||||||||||||||||||
| 8 | P Kühnen | 5 | 6 | 2 | S Matsuoka | 66 | 2 | ||||||||||||||||||||
| 4 | R Krajicek | 6 | 6 | P Baur | 78 | 6 | |||||||||||||||||||||
 J Apell | 1 | 4 | 4 | R Krajicek | 78 | 6 | |||||||||||||||||||||
 E Masso | 6 | 1 | 3 | D Goldie | 66 | 0 | |||||||||||||||||||||
| D Goldie | 2 | 6 | 6 | 4 | R Krajicek | 5 | 79 | 2 | |||||||||||||||||||
| S Melville | 6 | 7 | P Baur | 7 | 67 | 6 | |||||||||||||||||||||
 S Stolle | 1 | 5 | S Melville | 2 | 1 | ||||||||||||||||||||||
| P Baur | 77 | 6 | P Baur | 6 | 6 | ||||||||||||||||||||||
| 5 | A Mronz | 63 | 0 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 6 | G Bloom | 6 | 6 | ||||||||||||||||||||||||
 M Šrejber | 0 | 1 | 6 | G Bloom | 6 | 6 | |||||||||||||||||||||
| WC |  J-s Kim | 6 | 0 | 1 | WC | E-j Chang | 4 | 1 | |||||||||||||||||||
| WC | E-j Chang | 3 | 6 | 6 | 6 | G Bloom | 1 | 66 | |||||||||||||||||||
 K Evernden | 4 | 4 | J Tarango | 6 | 78 | ||||||||||||||||||||||
| J Tarango | 6 | 6 | J Tarango | 2 | 6 | 6 | |||||||||||||||||||||
| WC | S-h Ji | 77 | 5 | 6 | WC | S-h Ji | 6 | 2 | 1 | ||||||||||||||||||
| 3 | J Grabb | 64 | 7 | 4 | J Tarango | 2 | 7 | 6 | |||||||||||||||||||
| 7 | G Connell | 4 | 6 | 65 | L Herrera | 6 | 5 | 3 | |||||||||||||||||||
| B Shelton | 6 | 1 | 77 | B Shelton | 3 | 3 | |||||||||||||||||||||
| J Eltingh | 7 | 3 | 3 | L Herrera | 6 | 6 | |||||||||||||||||||||
| L Herrera | 5 | 6 | 6 | L Herrera | 6 | 6 | |||||||||||||||||||||
| LL | M Oosting | 1 | 6 | 6 | 2 | A Antonitsch | 1 | 2 | |||||||||||||||||||
| Q | H-c Shin | 6 | 3 | 4 | LL | M Oosting | 0 | 2 | |||||||||||||||||||
| B Garrow | 0 | 4 | 2 | A Antonitsch | 6 | 6 | |||||||||||||||||||||
| 2 | A Antonitsch | 6 | 6 | ||||||||||||||||||||||||
Second-seeded Pete Sampras defeated unseeded Gilad Bloom 7–6(11–9), 7–6(7–3) in the final to secure the title.
Nicolas Escudé was the defending champion but lost in the quarterfinals against Sébastien Grosjean.
Alex Antonitsch and Balázs Taróczy were the defending champions but lost in the semifinals to Jan Gunnarsson and Anders Järryd.
Byron Black and Jonathan Stark were the defending champions but did not compete that year.
Ivan Lendl was the defending champion and won in the final 6–3, 6–2 against Boris Becker.
The 2001 Energis Open tennis tournament was played in Amsterdam, Netherlands in July 2001.
Robert Van't Hof was the defending champion, but did not participate this year.
Scott Davis and Paul Wekesa were the defending champions, but did not participate this year.
Grant Connell and Glenn Michibata were the defending champions, but lost in the quarterfinals this year.
Alex Antonitsch and Gilad Bloom were the defending champions, but did not participate this year.
Wayne Ferreira and Jim Grabb were the defending champions, but did not participate this year.
Bernd Karbacher and Andrei Olhovskiy were the defending champions, but Olhovskiy did not participate this year. Karbacher partnered Alex Antonitsch, losing in the semifinals.
Mark Kratzmann defeated Stefan Kruger in the final, 6–4, 4–6, 6–3 to win the boys' singles tennis title at the 1984 Wimbledon Championships.
Steven Baldas and Scott Draper defeated Mahesh Bhupathi and Nitin Kirtane in the final, 6–1, 4–6, 9–7 to win the boys' doubles tennis title at the 1992 Wimbledon Championships.
Pablo Albano and Javier Frana were the defending champions, but none competed this year.
Greg Rusedski was the defending champion, but lost in the second round to David Witt.
Javier Frana and Christo van Rensburg were the defending champions, but van Rensburg did not compete this year. Frana teamed up with Mark Petchey and lost in the quarterfinals to Paul Annacone and Doug Flach.
Emilio Sánchez was the defending champion, but lost in the semifinal to Horacio de la Peña.
David Adams and Andrei Olhovskiy were the defending champions, but none competed this year. Adams chose to compete in Los Angeles during the same week.
Sergio Casal and Emilio Sánchez were the two-time defending champions, but Casal did not compete this year due to a wrist injury.