The stats would currently prove otherwise as Federer has spent more weeks as world No 1 than anybody else, holds more Grand Slam titles and is closing down on Jimmy Connors’ all-time ATP titles.
However, Djokovic is five years Federer’s junior so has plenty of time to close down the targets.
Meanwhile, Sandgren is looking to build on his impressive start to the year as he attempts to make it into America’s Olympic squad.
“Tennis is a tough sport; you try to peak at the right times, try to do your best in these weeks and grind, put your best foot forward,” he added.
source: express.co.uk