He played well in the latter two sets of his four-set triumph over Kei Nishikori - a match that lasted "just" 158 minutes - and created 14 break point chances in 17 return games.
He also went five sets to beat eight-time champion Roger Federer in the quarter-finals, winning the decider 13-11.
"They've paid to see two matches, and they came pretty close to only seeing one match", Anderson said.
The No. 8 seed beat the No. 9 Isner 7-6, 6-7, 6-7, 6-4, 26-24.
The Djokovic-Nadal match will resume with the roof closed, a decision that was left to the players to agree upon. That creates an unusual situation: Instead of a standard 2 p.m. start, Williams and Kerber won't know exactly when their match will begin. Djokovic cashed in on his second when Nadal's backhand found the net after an 18-stroke exchange.
But the struggle to hold serve continued into the next game with Nadal immediately regaining his break advantage with a wonderful forehand victor.
For the first time in 91 years, there will be a South African man in a Wimbledon singles final.
Isner now holds the record for the two longest matches ever played at Wimbledon - this one second only to the American's epic 11-hour, 5-minute classic against Nicolas Mahut in 2010. He played pretty well, I think, in the fifth set.
China trade surplus with USA hits record $29bn high
Speaking after a regular two-yearly review of China's trade policies at the World Trade Organization (WTO), Wang was sceptical. The ministry encouraged companies to increase import of soybean, soymeal, vehicles, aquatic products from other markets.
"At the same time, I'm through to the finals - wow, what can I say about that!" "My left heel is killing me". I apologize if I'm not more excited right now.
When asked how he would recover and play in the final Sunday, Anderson said: "It's tough, I really don't know".
In a Wimbledon men's singles semifinal match that experienced three tiebreakers and a fifth set that lasted 50 games, the margin for error was slim as could be.
Anderson made it clear Grand Slam tournament organisers should consider a rule change to make the deciding set of five-set matches less gruelling.
"I personally think a sensible option would be 12-All".
Anderson, the No. 8 seed, ultimately prevailed 6-7 (6), 6-7 (5), 6-7 (9), 6-4, 26-24, with the fifth set alone lasting almost three hours. John Isner of the US reacts during his semi final match against South Africa's Kevin Anderson.
Both players held serve all the way through the third set and into the tiebreaker, which saw Nadal fail to convert three separate set-point opportunities, including one on his own serve.
Anderson's fifth set alone lasted almost 3 hours as his semifinal became a test of endurance more than skill. "Fight, determination, hunger. you name it they showed it all", tweeted South African cricketer Morne Morkel, who was in the crowd of spectators at Wimbledon. Anderson had 49 aces in the victory.
Isner then shrugged off needing treatment on a blistered serving hand, found time to usher a ladybird to safety before levelling the match in another tiebreak off his 19th ace. The American roared and turned to his box as he took the third set on his third set point. Just as important, Isner, having saved a match point against Ruben Bemelmans in the second round, must feel as if he's playing with house money here.
He then converted his first match point when Isner sent a shot wide - after 6 hours, 36 minutes.