In press conference Roger Federer said: ''I like the energy he [Tiafoe] has, he's a really positive guy off court as well. I played another good match. A great start to the season for me. I'm very pleased and couldn't be happier right now. I hope I don't get injured from here until the doubles! I feel good right now. It was a really, really late night last night - New Year's Eve... I'm joking!'