"Just playing like that in those conditions was tough on both of us", added.
In the second semi-final also at Centre Court, world No 1 Rafael Nadal takes on three-time victor, Novak Djokovic.
It will resume Saturday at 1 p.m. local time (8 a.m. ET), ahead of the women's final between Serena Williams and Angelique Kerber.
It was the same tit-for-tat in the fifth and sixth games of the fourth set before Anderson produced a moment of brilliance, a superb cross-court backhand, to break in the ninth and subsequently held serve to win 6-4.
"If you ask majority, I'm sure they would have preferred to see a fifth-set tiebreaker, too". "My left heel is killing me". My left heel is killing and I have an terrible blister on my right foot.
The previous longest semifinal match at Wimbledon was in 2013, when Djokovic beat Juan Martín del Potro in 4 hours, 44 minutes.
"I really hope we can look at this and address this because in the end you don't even feel that great out there", the eighth seed said.He criticized the lack of a deciding-set tiebreaker at Wimbledon, the Australian Open and the French Open.
It was the third longest match in tennis history and the second-longest match Wimbledon has ever hosted. "I really do. I think with the performances I've had, I deserve to be in the semifinals", he continued.
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 slipped earlier in the match with Kevin Anderson.
Anderson had nearly surely forced the game back to deuce with a close-range dink over the net, but a exhausted Isner somehow stormed across the court to slam home a passing victor. While Anderson has lost five straight matches to Isner, two of them went to final-set tiebreakers, and the last time they faced off was in 2015, well before Anderson revamped his game and his mindset and cracked the Top 10.
Occasionally there were outbreaks of tennis amid the thudding serves, with one 23-shot rally won by Anderson at 6-5 in the first set.
Until Friday, he had not dropped serve until Anderson halted that run at 110 service games in the third set.
A total of 569 points were played, with Anderson winning 298 points and Isner winning 271.
After all this was at 24-all in the fifth set of a semi-final against John Isner that had been going on for what seemed like forever but was in fact well past the 6-1/2 hour mark. The record, funnily enough, was set by Isner.
Boy, would we have loved to see that!
Of course, Isner has a consistent serve as his main weapon and when combined with his forehand, is possessed of a solid one-two punch combination.