Isner and Anderson also share the distinction of each owning arguably the most feared serve in tennis, meaning long rallies will be nearly non-existent this afternoon. "Friday is another important match against an opponent that is one of the most hard ones that you can face".
Like Federer and Anderson, Nadal and del Potro Nadal slugged it out for more than four pulsating hours before Spain's 17-times major victor finally landed the knockout punch.
After the match, the second seed told the BBC: 'It was a very emotional match - great qualify of tennis.
World number one Nadal, the 2008 and 2010 champion at the All England Club, trails Djokovic, the 2011, 2014 and 2015 victor, 26-25 in a rivalry which began at Roland Garros 12 years ago.
Add in Nadal, 32, and Djokovic, 31, and it's the first time in the half-century of professional tennis that all four male semifinalists at any Slam are in their 30s. He is one of the more complex players that I have ever seen in our sport. I'd guess that Rafa will have more self-belief than Djokovic in the early going.
Playing him is always a big challenge.
He showed signs of recovering at the French Open before a shock loss in the quarter-finals against unseeded Italian Marco Cecchinato, then reached the Queen's final where more mental fragility proved his undoing against Marin Cilic.
It is fair to say the first semi-final will feature less subtlety than the second. I'm really happy for you.
"I just try to build the momentum".
After a hectic clay-court season where he won the Monte Carlo, Rome and French Open titles, Nadal made a decision to go into Wimbledon without playing a warm-up event on grass for the second year running.
After smoothly slicing through his first four matches the five-set struggle over four hours and 47 minutes, the longest of the tournament, was probably Nadal's flawless preparation for Djokovic, who will test his stamina and movement in entirely different ways, with swift changes of direction rather than raw power and, if it is singing, his serve.
While Djokovic saw through Kei Nishikori with relative ease, winning the match in 4 sets 6-3, 3-6, 6-2, 6-2, Nadal played one of the best matches of the season so far as he prevailed in 5 sets over Juan Martin Del Potro, winning the match 7-5, 6-7, 4-6, 6-4, 6-4 in over four hours.
After seven weeks out with a serious knee injury, many doubted if Nadal would regain his crown as the "King of Clay". At two sets to one down, the prospect of Nadal and Federer exiting a grand-slam tournament on the same day for the first time was becoming real.
The eighth-seeded Anderson stands 6-foot-8 (2.03m), while ninth-seed Isner is two inches taller at 6-foot-10 (2.08m).
Friday's showdown will be their 52nd meeting overall _ the most for any pair of men and 14 more installments than Federer vs. Nadal _ and first at the All England Club since 2011.
Nadal wasted a fourth chance at 7-6, before letting 2009 U.S. Open champion del Potro grab three points in a row for that set.
"Anything could have happened, so this is a big achievement for me to get to the semi-finals at Wimbledon".
"But also putting myself in these positions where hopefully I'm able to get another step forward and be playing on Sunday".
Karlovic and American player Reilly Opelka, who's also 6-foot-11, are the two tallest players listed on the ATP World Tour. I went to the net.
"I think I did a lot of things well".