Novak Djokovic began his latest bid for a record 25th Grand Slam crown with an emphatic straight-sets victory Monday as fellow Australian Open title contenders Iga Swiatek and Coco Gauff also won but with less sparkle.

Three-time finalist Daniil Medvedev stayed alive, as did 40-year-old Stan Wawrinka, who rolled back the clock to reach the second round in his tournament farewell.