Actually, both is necessary.
Isner was serving first, with Anderson then having to hold each time in order to stay alive in the match.
"He's someone that pushes me, I think".
The South African was the better player on the court and he finally broke Isner's serve in game 29, closing the match with a hold in the following game to win the third longest singles match in the history of tennis and book his place in the first Wimbledon final.
Anderson became the first South African male to reach the final since 1921 with a 7-6 (6), 6-7 (5), 6-7 (9), 6-4, 26-24 victory on Centre Court.
Experience will play a big part here for Anderson - he has been in this position before and alas he capitulated completely to Rafael Nadal in the US Open final a year ago, but it is a series of matches that will have served him in good stead. The fifth set lasted 175 minutes.
And he made it clear Grand Slam tournament organisers should consider a rule change - perhaps introducing a tie-break at 6-6 - to make the deciding set of five-set matches less gruelling.
Fast facts: Isner leads Anderson 8-3 in head-to-head matchups on the ATP tour. "It's pretty tough in the format that we have right now, especially at Slams. Can't finish them off, if one person can't finish the other off before 12-All, then do a tiebreaker there", Isner said.
"A sensible option", Isner called it.
Anderson's opponent for the title will be Nadal or Novak Djokovic, who did not set foot on Centre Court until just before 8 p.m. on Friday evening, after waiting around all day.
The 12th-seeded Peschke and Melichar came from a break down in the final set to see off the sixth-seeded pairing of Dabrowski of Canada and Xu of China. I apologize if I'm not more excited right now. There was this: the tumble Anderson took late in the match, only to somehow hop up, hit the ball left handed and ultimately claim the point - all as the typically stoical Wimbledon crowd gasped and screamed above them. I'm definitely going to have to recover as much as I can. Isner wasted a set point in the opener.
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.
"It would have been the dream match for me to test my serve and volley against her power game, although it would never have been enough to just serve and volley as she loves a target", Navratilova wrote.
"I feel pretty bad", Isner said afterward.