Zverev, who became the fifth player to reach five or more semifinals at the event after former champions Roger Federer, Yevgeny Kafelnikov, Philipp Kohlschreiber and Tommy Haas, now faces one of his oldest rivals, Daniil Medvedev. Medvedev knocked out Alex Michelsen 6-4, 6-3 to reach his third tour-level semifinal of the season.