World number one Carlos Alcaraz has been knocked out of the National Bank Open after losing to American Tommy Paul for the second straight year in Toronto.
Andy Murray's return to clay ended in a swift 6-1 6-3 defeat to Alex De Minaur in the first round of the Monte Carlo Masters.
Novak Djokovic was firing on all cylinders as he dismantled home favourite Alex De Minaur to reach the quarter-finals of the Australian Open for the 13th time.