Buenos Aires, Argentina
A clay-court player who considers his forehand his best shot, Leonardo Mayer is a former ITF junior No. 2. He beat former world No. 1 Juan Carlos Ferrero en route to the Sao Paulo quarterfinals in February, 2012. On July 20, 2014, the 46th-ranked Mayer defeated top-seeded David Ferrer, 6-7 (3), 6-1, 7-6 (4) to capture his first career ATP title in Hamburg.