Roger Federer kept his unblemished second-round record at the US Open intact after he came from a set down against Bosnia and Herzegovina's Damir Dzumhur to win 3-6 6-2 6-3 6-4.
Roger Federer kept his unblemished second-round record at the US Open intact after he came from a set down against Bosnia and Herzegovina's Damir Dzumhur to win 3-6 6-2 6-3 6-4.