Reigning Wimbledon champion Carlos Alcaraz and Olympic gold medallist Alexander Zverev have led a record number of men's seeds into the Australian Open second round.
Zverev's 4-6 6-3 7-6 (7-3) 6-3 win over fellow German Dominik Koepfer ensured at least 29 seeds would make the last 64 at Melbourne Park.
Alcaraz's 7-6 (7-5) 6-1 6-2 defeat of French veteran Richard Gasquet in Tuesday's feature night match on Rod Laver Arena then made it 30 protected seeds to progress to round two.
