| Singles | |
|---|---|
| 2003 Miller Lite Hall of Fame Championships | |
| 2002 Champion |  Taylor Dent |
| Champion | Robby Ginepri |
| Runner-up |  Jürgen Melzer |
| Final score | 6–4, 6–7 (3–7), 6–1 |
Taylor Dent was the defending champion but did not compete that year.
Robby Ginepri won in the final 6–4, 6–7 (3–7), 6–1 against Jürgen Melzer.
A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated.
James Blake (first round) Mardy Fish (first round) Robby Ginepri (champion)
Raemon Sluiter (first round) Brian Vahaly (first round) Justin Gimelstob (quarterfinals) Jürgen Melzer (final)Tommy Haas was the defending champion, and won in the final 6–3, 6–2, against Andy Roddick.
Tomáš Berdych defeated Ivan Ljubičić in the final, 6–3, 6–4, 3–6, 4–6, 6–4, to win the singles title at the 2005 Paris Masters.
Jarkko Nieminen defeated Mario Ančić 6–2, 6–2 to win the 2006 Heineken Open singles competition. Fernando González was the defending singles champion of the tennis tournament, held in Auckland, New Zealand.
Andy Roddick was the defending champion but lost in the final 3–6, 6–3, 6–4 against Andre Agassi.
Andre Agassi was the defending champion but did not compete that year.
Sébastien Grosjean was the defending champion, but lost in the first round to Robby Ginepri.
Rafael Nadal defeated Ivan Ljubičić in the final, 3–6, 2–6, 6–3, 6–4, 7–6(7–3) to win the singles title at the 2005 Madrid Open. As of 2021, this remains his sole indoor hard court title.
Roger Federer was the defending champion but withdrew due to fatigue, Tommy Robredo defeated Radek Štěpánek in the final, 6–1, 6–3, 6–3.
Andy Murray was the defending champion, but lost to Mardy Fish in the second round.
Andrea Gaudenzi was the defending champion but lost in the second round to Jürgen Melzer.
Neville Godwin was the defending champion but lost in the first round to Jeff Morrison.
Robbie Koenig and Thomas Shimada were the defending champions but only Koenig competed that year with Petr Pála.
Andre Agassi was the defending champion but lost in the semifinals to Mardy Fish.
Jürgen Melzer was the two-time defending champion, but lost to Kevin Anderson in the quarterfinals.
Robby Ginepri was the defending champion, but lost to Andy Roddick in the semifinals.
Andy Roddick was the defending champion, but lost in the first round to Xavier Malisse. Jürgen Melzer defeated Milos Raonic in the final 7–5, 7–6(7–4).
Juan Mónaco was the defending champion, but lost to John Isner in the semifinals.
Isner went on to win the title, defeating Nicolás Almagro in the final, 6–3, 7–5.
Robby Ginepri was the defending champion, but did not participate.
