De Minaur's ATP Mexico march goes on

As the fifth seed continues to fine-tune his preparations for the US Open, which begins at Flushing Meadows on August 28, de Minaur will face Germany's Dominik Koepfer for a place in the final.

The No.7 seed dispensed with the USA's Aleksandar Kovacevic in straight sets, 6-4 7-5.

Greek top seed Stefanos Tsitsipas takes on Chile's Nicolas Jarry for a place in the other semi, against either Croatia's Borna Coric or Belarusian Ilya Ivashka.