Mladenovic opened her grass-court season in Birmingham, but lost her opening match to Shahar Pe'er of Israel. She then competed in 's-Hertogenbosch qualifying, managing to win a round but ultimately falling to CoCo Vandeweghe, who would go on to qualify and win the entire tournament. At Wimbledon, she drew Zarina Diyas in the first round, but fell to the Kazakh in what was a rain delayed straight-set encounter. In the doubles draw, Mladenovic partnered Tímea Babos of Hungary, and reached their first Grand Slam women's doubles final, ultimately losing to Sara Errani and Roberta Vinci in straight sets. She then stunned at the İstanbul Cup the third seed Klára Koukalová, but lost in the semifinals to No. 1 seed Caroline Wozniacki. Her strong run returned her to the top 100, at No. 81. At Baku, she lost in quarterfinals, losing to Francesca Schiavone in a rematch of the İstanbul Cup quarterfinals. She next competed at the Citi Open, where she stunned top seeded Lucie Šafářová, before defeating qualifier Taylor Townsend. She lost to Kurumi Nara in the quarterfinals. After the Citi Open, Mladenovic lost in the final round of qualifying to Yanina Wickmayer in Montréal, and also the first round of qualifying in Cincinnati. She played doubles in Montréal, losing in the first round with partner Tímea Babos.