Thursday 7 September 2017 10:55, UK
Roger Federer and Juan Martin Del Potro will face off on Wednesday night in the US Open quarter-finals in a rematch of the 2009 final.
Del Potro won his only Grand Slam on that occasion but, eight years later, returns as the 24th seed aiming to upset Federer who has already won this year's Australian Open.
"I think we're different players today," Federer told the ATP's website. "We both play differently. Because of his surgery, I think his backhand has changed. He uses his slice much more. Just alone because of that, the game would be different.
"I'm playing more aggressive, as well, on the return. I play shorter points. I don't use my slice as much, whereas he does now. It's a bit of a change. We did play each other in Miami, so I did get a sense of how it is to play him now. But the forehand and the serve is still identical, in my opinion.
"He maybe even created more power by now just because years went by, better technology has come around. I think we're both more laid back today."
Top seed Rafael Nadal, this year's French Open champion, plays the unseeded Andrey Rublev in his own quarter-final.
Karolina Pliskova meets CoCo Vandeweghe and Madison Keys faces Kaia Kanepi in the ladies' draw.
Sky Sports Tennis will have all the action from the US Open covered via our website sky.mnosports.com/tennis with our live blogs and updates throughout the fortnight as the Grand Slam year reaches its climax.
On the move? Head to our app for mobile devices and iPad, or follow our Twitter account @SkySportsTennis to join in the conversation. Who will win the US Open titles this year? Have your say...
