2009 Mutua Madrileña Madrid Open – Men's singles

Roger Federer defeated Rafael Nadal in the final, 6–4, 6–4 to win the men's singles tennis title at the 2009 Madrid Open.

Andy Murray was the defending champion, but lost in the quarterfinals to Juan Martín del Potro.

The semifinal match between Nadal and Novak Djokovic was (at the time) the longest men's tennis match in the Open Era played with the best-of-three-sets system, stretching for 4 hours and 3 minutes with Nadal prevailing, 3–6, 7–6(7–5), 7–6(11–9) after saving three match points in the third-set tiebreak. This record was later broken by Federer and del Potro at the 2012 London Olympics in their 4-hour and 26-minute semifinal match.

This was the first edition of the tournament to be held on outdoor clay courts, having previously been held on indoor hard courts.

Seeds
The top eight seeds receive a bye into the second round. • # 🇪🇸 Rafael Nadal (final)

• # Roger Federer (champion)

• # 🇷🇸 Novak Djokovic (semifinals)

• # 🇬🇧 Andy Murray (quarterfinals)

• # 🇦🇷 Juan Martín del Potro (semifinals)

• # 🇺🇸 Andy Roddick (quarterfinals)

• # 🇪🇸 Fernando Verdasco (quarterfinals)

• # 🇫🇷 Gilles Simon (third round)

• # 🇫🇷 Jo-Wilfried Tsonga (second round)

• # 🇷🇺 Nikolay Davydenko (third round, withdrew due to injury)

• # Stan Wawrinka (third round)

• # 🇪🇸 David Ferrer (second round)

• # Marin Čilić (second round)

• # 🇺🇸 James Blake (third round)

• # 🇨🇿 Radek Štěpánek (first round, retired due to a left knee injury)

• # 🇪🇸 Tommy Robredo (third round)

Seeds
• # 🇩🇪 Mischa Zverev (first round, retired due to leg injury)

• # 🇷🇺 Teymuraz Gabashvili (qualified)

• # 🇦🇷 Eduardo Schwank (qualified)

• # 🇪🇸 Guillermo García López (qualifying competition, lucky loser)

• # 🇦🇷 Máximo González (first round)

• # 🇮🇹 Fabio Fognini (qualified)

• # 🇩🇪 Tommy Haas (qualified)

• # 🇪🇸 Daniel Gimeno Traver (first round)

• # 🇪🇸 Iván Navarro (qualifying competition, lucky loser)

• # 🇰🇿 Evgeny Korolev (qualifying competition)

• # 🇪🇸 Pablo Andújar (qualifying competition)

• # Nicolás Massú (first round)

• # 🇪🇸 Alberto Martín (qualifying competition)

• # 🇦🇷 Guillermo Cañas (qualified)

Qualifiers
• # 🇦🇷 Guillermo Cañas

• # 🇷🇺 Teymuraz Gabashvili

• # 🇦🇷 Eduardo Schwank

• # 🇦🇷 Juan Ignacio Chela

• # 🇮🇹 Marco Crugnola

• # 🇮🇹 Fabio Fognini

• # 🇩🇪 Tommy Haas

Lucky losers
• # 🇪🇸 Guillermo García López

• # 🇪🇸 Iván Navarro