Alexander Zverev defeated Stefanos Tsitipas in straight sets.
González (MEX) and Demoliner (BRA) lost against Salisbury (ENG) and Ram (USA).
Tsitsipas suffered, Zverev had no rival (literally).
He defeated Laslo Djere (SRB) in the round of 16.
Lorenzo Musetti (ITA), 19, beat him in 3 sets, in a great match.
Serbia was eliminated from the ATP after losing to Germany, which qualifies for the semi-final, 2-1.