Julien Benneteau and Nicolas Mahut were the defending champions, however Benneteau was injured (left wrist).
Julien Benneteau (] ; born 20 December 1981) is a French professional tennis player.
 His career-high singles ranking is ATP world no. 25, which he reached in November 2014.
 He formerly resided in Boulogne-Billancourt and now lives in Geneva.
 Benneteau is generally regarded as one of the best singles players on the tour who has not won a title, finishing as runner-up in ten ATP tournaments.
 He reached the quarterfinals of the 2006 French Open and the semifinals of the 2014 Cincinnati Masters.
Julien Benneteau and Nenad Zimonjić were the defending champions, but decided not to participate together.
 Benneteau played alongside Édouard Roger-Vasselin, but lost to Bob and Mike Bryan in the quarterfinals.
 Zimonjić teamed up with Daniel Nestor, but lost to the Bryan brothers in the semifinals.
 The Bryans became the new champions, defeating Ivan Dodig and Marcelo Melo 6–3, 3–6, [10–8] in the final.
Jonathan Dario "Yoni" Erlich (Hebrew: יונתן דאריו "יוני" ארליך‎ ‎ , born in Buenos Aires, Argentina, April 5, 1977) is a professional Israeli tennis player.
 He plays doubles, primarily.
Julien Benneteau and Édouard Roger-Vasselin were the defending champions, but did not participate due to Benneteau's injury.
Julien Benneteau and Nenad Zimonjić were the defending champions, but chose not to participate together.
 Benneteau played alongside Michaël Llodra, but lost to Jean-Julien Rojer and Horia Tecău in the first round.
 Zimonjić teamed up with Daniel Nestor, but lost to Juan Sebastián Cabal and David Marrero in the first round.
Julien Benneteau and Jo-Wilfried Tsonga were the defending champions, but Benneteau chose to not participate due to left wrist injury.
Julien Benneteau and Édouard Roger-Vasselin were the defending champions, but Benneteau withdrew from the tournament because of a sports hernia.
 Roger-Vasselin played alongside Guillermo García-López, but lost in the third round to Ivan Dodig and Marcelo Melo.
Novak Djokovic and Jonathan Erlich were the defending champions, but Djokovic decided not to compete, and Erlich chose to play at Halle instead.
Sergiy Stakhovsky was the defending champion, but lost to Julien Benneteau in the quarterfinals.
 John Isner defeated Benneteau in the final, 4–6, 6–3, 6–4.

Question: What do Julien Benneteau and Jonathan Erlich have in common?
Answer: tennis player.