Jannik Sinner powers into Australian Open second round while Monfils says goodbye

Reigning champion through after Hugo Gaston retires Retiring Monfils, 39, thanks crowd for amazing rideThe defending champion Jannik Sinner advanced to the second round of the Australian Open on Tuesday, taking just over an hour after his French opponent Hugo Gaston retired upon losing the first two sets 6-2, 6-1.In his first official match since beating Carlos Alcaraz for the ATP Finals crown in November, the Italian world No 2 was in ominous form on Rod Laver Arena.