Explanation:

- Leander Paes: Became the most successful doubles player in the history of the Davis Cup in 2018. He surpassed the previous record for the most doubles wins in Davis Cup history.

- Mark Woodforde: An accomplished Australian tennis player, known mostly for his doubles prowess alongside his partner Todd Woodbridge. However, he is not the most successful in Davis Cup doubles history as of 2018.

- Henri Leconte: A French tennis player well-regarded for his performance in both singles and doubles, but he doesn't hold the record for Davis Cup doubles wins.

- Leon Smith: He is known more as a tennis coach and captain of the British Davis Cup team, rather than for his playing records.