As the two-time defending champion, Federer entered the first Grand Slam tournament of the season, the Australian Open, as the No. 3 seed.His first match was a straight-sets victory over Denis Istomin, followed by another one against Daniel Evans.In the third round he defeated Taylor Fritz, again in straight sets, but was upset by Stefanos Tsitsipas in the fourth round, losing in four tight sets.
: https://en.wikipedia.org/wiki/2019_Roger_Federer_tennis_season