| Singles | ||||
|---|---|---|---|---|
| 2009 ATP World Tour Finals | ||||
| Final | ||||
| Champion |  Nikolay Davydenko | |||
| Runner-up |  Juan Martín del Potro | |||
| Score | 6–3, 6–4 | |||
| Events | ||||
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Nikolay Davydenko defeatedJuan Martín del Potro in the final, 6–3, 6–4 to win the singles tennis title at the 2009 ATP World Tour Finals.
Novak Djokovic was the defending champion, but was eliminated in the round-robin stage.
Fernando Verdasco andRobin Söderling made their debuts at the event.
Andy Roddick qualified for the tournament, but withdrew due to a left leg injury, where he was replaced by Söderling.
Roger Federer(semifinals)
Rafael Nadal(round robin)
Novak Djokovic(round robin)
Andy Murray(round robin)Juan Martín del Potro(final)Nikolay Davydenko (champion)Fernando Verdasco(round robin)
Robin Söderling(semifinals)
Jo-Wilfried Tsonga(Did not play)
Ivan Ljubičić(Did not play)Key
| Semifinals | Final | ||||||||||||
| 1 | Roger Federer | 2 | 6 | 5 | |||||||||
| 6 | Nikolay Davydenko | 6 | 4 | 7 | |||||||||
| 6 | Nikolay Davydenko | 6 | 6 | ||||||||||
| 5 | Juan Martín del Potro | 3 | 4 | ||||||||||
| 8 | Robin Söderling | 77 | 3 | 63 | |||||||||
| 5 | Juan Martín del Potro | 61 | 6 | 77 | |||||||||
| Federer | Murray | del Potro | Verdasco | RR W–L | Set W–L | Game W–L | Standings | ||
| 1 | Roger Federer | 3–6, 6–3, 6–1 | 2–6, 7–6(7–5), 3–6 | 4–6, 7–5, 6–1 | 2–1 | 5–4 (55.6%) | 44–40 (52.4%) | 1 | |
| 4 | Andy Murray | 6–3, 3–6, 1–6 | 6–3, 3–6, 6–2 | 6–4, 6–7(4–7), 7–6(7–3) | 2–1 | 5–4 (55.6%) | 44–43 (50.6%) | 3 | |
| 5 | Juan Martín del Potro | 6–2, 6–7(5–7), 6–3 | 3–6, 6–3, 2–6 | 6–4, 3–6, 7–6(7–1) | 2–1 | 5–4 (55.6%) | 45–43 (51.1%) | 2 | |
| 7 | Fernando Verdasco | 6–4, 5–7, 1–6 | 4–6, 7–6(7–4), 6–7(3–7) | 4–6, 6–3, 6–7(1–7) | 0–3 | 3–6 (33.3%) | 45–52 (46.4%) | 4 |
Standings are determined by: 1. number of wins; 2. number of matches; 3. in two-players-ties, head-to-head records; 4. in three-players-ties, percentage of sets won, or of games won; 5. steering-committee decision.
| Nadal | Djokovic | Davydenko | Söderling | RR W–L | Set W–L | Game W–L | Standings | ||
| 2 | Rafael Nadal | 6–7(5–7), 3–6 | 1–6, 6–7(4–7) | 4–6, 4–6 | 0–3 | 0–6 (0.0%) | 24–38 (38.7%) | 4 | |
| 3 | Novak Djokovic | 7–6(7–5), 6–3 | 3–6, 6–4, 7–5 | 6–7(5–7), 1–6 | 2–1 | 4–3 (57.1%) | 36–37 (49.3%) | 3 | |
| 6 | Nikolay Davydenko | 6–1, 7–6(7–4) | 6–3, 4–6, 5–7 | 7–6(7–4), 4–6, 6–3 | 2–1 | 5–3 (62.5%) | 45–38 (54.2%) | 2 | |
| 8 | Robin Söderling | 6–4, 6–4 | 7–6(7–5), 6–1 | 6–7(4–7), 6–4, 3–6 | 2–1 | 5–2 (71.4%) | 40–32 (55.6%) | 1 |
Standings are determined by: 1. number of wins; 2. number of matches; 3. in two-players-ties, head-to-head records; 4. in three-players-ties, percentage of sets won, or of games won; 5. steering-committee decision.