Éric Prodon successfully defended his title. He defeated Alexander Flock, João Sousa, Timo Nieminen, Jonathan Dasnières de Veigy and Augustin Gensse to win this tournament.
João Sousa and Leonardo Tavares were the defending champions, but they withdrew before their match against Dasnières de Veigy and Guez.
Nicolás Almagro was the two-time defending champion, but lost in the quarterfinals to David Nalbandian.
Rafael Nadal won the title, defeating Nalbandian in the final 6–2, 6–3.
Aljaž Bedene was the defending champion but chose to compete in the 2013 Aegon Championships instead.
Mikhail Kukushkin won the title defeating Damir Džumhur in the final, 6–4, 1–6, 6–2.
Andrey Kuznetsov was the defending champion but decided not to participate.
Pere Riba beat Santiago Giraldo 7–6(7–5), 2–6, 7–6(8–6), to win the title.
Roberto Bautista-Agut was the defending champion but chose to participate at the 2013 Crédit Agricole Suisse Open Gstaad instead.
David Ferrer was the defending champion, but lost to Mikhail Youzhny in the final, 3–6, 5–7.
Tommy Robredo was the defending champion, but he decided to compete in Houston instead.
João Sousa was the defending champion but chose not to compete.
Carlos Berlocq was the defending champion, but lost to João Sousa in the semifinals.
Pablo Cuevas won his first ATP World Tour title, defeating Sousa in the final, 6–2, 6–1.
Thomas Fabbiano was the defending champion, but chose not to compete.
Tommy Robredo was the defending champion, but lost to Pablo Cuevas in the final, 3–6, 4–6.
Gilles Simon was the defending champion, but withdrew with a right wrist injury before the tournament began.
Víctor Estrella Burgos was the defending champion and successfully defended his title, defeating Thomaz Bellucci in the final, 4–6, 7–6(7–5), 6–2.
Dominic Thiem was the defending champion, but chose to compete in Kitzbühel instead.
Nicolás Almagro was the defending champion, but lost in the quarterfinals to Pablo Carreño Busta.
Gonzalo Lama was the defending champion but lost in the first round to João Souza.
Víctor Estrella Burgos was the three-time defending champion and the tournament's only champion to date, but lost in the second round to Gerald Melzer.
Andrey Rublev was the defending champion, but lost in the quarterfinals to Robin Haase. This was Rublev's first tournament back on tour after missing three months due to a stress fracture in his back.
Pedro Sousa was the defending champion but lost in the final to Andrej Martin.
