The Canadian is already focussing on getting better for 2020.
The Swiss earned his spot in the second round by defeating Sumit Nagal in four sets.
Naomi Osaka, Rafael Nadal and Sloane Stephens will be in action on Day 2--and that's not all.
Serena Williams deadpans an interesting response to a Carlos Ramos-related question.
Former US Open finalist maintains straight-forward approach.
The Canadian has now missed four of the last nine majors with injuries.
Federer, Djokovic and Serena v. Maria highlight a busy day one at the US Open.
