Alexander Zverev loses to Daniel Altmaier in first round of ATP tournament in Acapulco. First defeat against a German tennis professional since he lost to Dustin Brown in Stuttgart almost five years ago.
Dominik Koepfer from the Black Forest also advanced to the next round thanks to a 6:4, 4:6, 6:0 win against French qualifier Terence Atmane. The Davis Cup player will face number eight seed Frances Tiafoe from the USA in the round of 16.