See main article: 2013 ATP World Tour Finals.
David Marrero and Fernando Verdasco defeated Bob and Mike Bryan in the final, 7–5, 6–7(3–7), [10–7] to win the doubles tennis title at the 2013 ATP World Tour Finals.
Marcel Granollers and Marc López were the defending champions, but they were eliminated in the round-robin stage.
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.
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.