Felix Auger-Aliassime was a shock exit at the Hamburg Open, while Taylor Fritz lost his first match since returning from injury in Geneva.
In Monday's early ATP action at the Madrid Open, there were wins for Daniil Medvedev, Casper Ruud and Stefanos Tsitsipas.
Joao Fonseca wasted little time booking his place in the Munich Open quarter-finals, needing just over an hour to beat Arthur Rinderknech.
Sebastian Baez will play Carlos Alcaraz in the second round of the Monte-Carlo Masters after getting the better of Stan Wawrinka.
No results available
No matches available.