2018 ATP Finals – Doubles
and John Peers were the two-time defending champions, but they only qualified for the first alternate spot. Kontinen and Peers replaced Nikola Mektić and Alexander Peya for the last match in the round robin competition.
Mike Bryan and Jack Sock won the title, defeating Pierre-Hugues Herbert and Nicolas Mahut in the final, 5–7, 6–1, .Seeds
Alternates
Draw
Finals
Group Knowles/Nestor
Group Llodra/Santoro
Standings are determined by: 1. Number of wins; 2. Number of matches; 3. In two-player ties, head-to-head records; 4. In three-player ties, percentage of sets won, then percentage of games won, then ATP rankings