"I don't know why Del Potro shouldn't think he has a great chance", Wilander said. The grass isn't as slick as usual, the ball is bouncing higher, making the playing conditions more to Nadal's liking.
When he lost his 2016 semi-final to Milos Raonic, Federer feared his career may be over after seriously injuring his knee in an on-court tumble.
Anderson added that Federer, who won his first Wimbledon title in 2003, is the flawless role model for the sport - and for those players in the chasing pack.
And all on a surgically-repaired knee.
Meanwhil, world number 26, Mannarino raised his game in the following two sets. Shouldn't really happen, but thankfully they do for me. He edged Gael Monfils 7-6 (4), 7-6 (2), 5-7, 7-6 (4), to whom he held a 0-5 head-to-head record entering the match.
Novak Djokovic ensured he will have a Wimbledon rest day on Tuesday after beating Karen Khachanov and the fading light to reach the quarter-finals. Rafa winning, he was on the floor, all the flashes.
Wednesday's other quarter-final sees 2016 runner-up Raonic tackle U.S. ninth seed Isner, making his Wimbledon last-eight debut at 33. Is true has been a while since I have been in that position.
But there was no stopping the Serb once he made it on to Court One as he romped to a 6-4, 6-2, 6-2 win to reach the quarter-finals for a 10th time.
"I think psychologically there's a huge difference for Anderson to play on Court One rather then Centre", the Swede, working as Eurosport's chief analyst, told Reuters.
The Swiss maestro plays eighth Kevin Anderson, with the South Africa's 2017 Flushing Meadows finalist who is into his first quarter-final on his 10th visit to London's SW19. That, of course, is a positive result.
"The expectations he's had to deal with for over a decade, 15 years, I mean, at the top of the game, he's able to deal with it so well, which isn't easy". "Sometimes the things works better, sometimes worse".
The last-16 tie between Del Potro and Frenchman Simon was suspended overnight due to darkness on Monday with the Argentine fifth seed two sets to one ahead. Back in 2008, Nike were so sure the pair would meet in the US Open final that even before the event started they launched an advertising campaign trailing the match.