Analyse @TennisTV's tweets
A stunner Down Under ?
20 y/o @StefTsitsipas knocks out defending champion Roger Federer 6-7 7-6 7-5 7-6 for the biggest win of his young career ?
#AusOpen
https://t.co/jVtejAu24R
20 y/o @StefTsitsipas knocks out defending champion Roger Federer 6-7 7-6 7-5 7-6 for the biggest win of his young career ?
#AusOpen
https://t.co/jVtejAu24R