Together with Spanish 19-year-old Rafael Jodar, who beat German Yannick Hanfmann 6-4 4-6 6-1, the five teenagers reaching the second round in Miami marked the first such occurrence since 2007, when a group including the 19-year-old Novak Djokovic, Andy Murray, Evgeny Korolev and Sam Querrey , as well as Juan Martin del Potro, 18, came through the opening round.