Smith himself is Federer's fan, attending his games a few times and even clicking photos with the Swiss legend. Legendary boxing promoter Don King was brought in to hype up the contest - using the moniker "Grapple in the Apple".
Three-time champion Novak Djokovic, seeded a lowly 12 this year, can make his 10th Wimbledon quarterfinal if he defeats unseeded Karen Khachanov, the world No. 40 from Russian Federation. The upset serves as a reminder that in sport, match-ups can not be cherry-picked in advance. "You always tend to play better against better players and I'm happy to be back in the second week of Wimbledon".
Two of those men have experience in doing precisely that.
There aren't many people who could teach Sachin Tendulkar a thing or two about cricket, but Federer appears to be one of them. "Luckily for me it didn't happen", he said of the tie which preceded his clash with Khachanov.
The world No.1 and reigning French Open champion also extended his grand slam streak to 11 matches to book an appointment on Thursday with either Argentine fifth seed Juan Martin del Potro or veteran Frenchman Gilles Simon.
"It was important for me to stay focused".
Elsewhere in fourth round action, Dominika Cibulkova launched a scathing attack on Wimbledon's officials after a line call controversy marred her 6-4, 6-1 win against Taiwan's Hsieh Su-Wei.
The underdog was far more competitive thereafter, but Federer still triumphed easily and will face Gael Monfils or Kevin Anderson in his 16th Wimbledon quarterfinal. But from what I've seen from him in the last couple of days, he looks like he's playing really, really well.
While the men get Tuesday off at Wimbledon, the women return for their quarterfinals.
Serena Williams has won the second set to level her Wimbledon quarterfinal with Camila Giorgi.
Many are already anticipating a Sunday final between Federer and Nadal, 10 years after their 2008 epic championship showdown widely regarded as the greatest final ever played.
"Certainly this tournament, since that long match, has sort of been a house of horrors for me", Isner said.
(12) Jelena Ostapenko bt.
Nadal reached the quarterfinals of Wimbledon for the first time since 2011 after defeating Jiri Vesely in a 6-3, 6-3, 7-5 victory on Monday.
Federer's progress through the draw has been smooth and serene, not dropping a set nor losing a service game on his way to an Open era record 53rd Grand Slam quarter-final.