Sinner demolished Novak Djokovic 6-3, 6-3, 6-4 in a Centre Court masterclass on Friday to reach his first Wimbledon title match and his fifth at the Grand Slams.
Just hours earlier, Alcaraz – who has won the last two Wimbledon titles – reached his third successive All England Club final.
The Spanish world number two battled to a 6-4, 5-7, 6-3, 7-6 (8/6) win against American fifth seed Taylor Fritz.
Sinner, 23, will be desperate to avenge his painful French Open defeat against Alcaraz after squandering a two-set lead and three championship points in an epic Roland Garros final in June.
Only 35 days after that five-set marathon on clay in Paris, they will meet again on the lawns of Wimbledon.
Sinner and Alcaraz are the undisputed new kings of men’s tennis, claiming the past six majors between them.
Sinner, the reigning US Open and Australian Open champion, returned from a doping ban in May, losing the Italian Open final to Alcaraz before his stunning collapse at Roland Garros.
Now he has a chance for revenge against the man who is the current top dog on grass.
“It is a huge honour for me to share the court once again with Carlos,” Sinner said. “We try to push ourselves to the limit, he is for sure one of the players I look up to.
“I love watching him, what kind of talent he is. Hopefully it’s going to be a good match like the last one.”
Sinner trails 8-4 in his head to head meetings with Alcaraz, losing the past five matches.
The Italian can take heart from beating Alcaraz in the Wimbledon fourth round in 2022, his rival’s last defeat at the All England Club.
Reflecting on the prospect of another showdown with his arch rival, Alcaraz said: “In Paris it was the best match I have ever played so far. I’m not surprised he just pushed me to the limit.
“I expect that on Sunday, just to be in the limit. It’s going to be a great final. I’m excited about it.
“I just hope not to be five hours and a half on court again! As I said, if I have to, I will. But I think it’s going to be great.”
Seven-time Wimbledon champion Djokovic, who was not 100 percent fit after an injury in his quarter-final against Flavio Cobolli, must wait for another shot at a record 25th Grand Slam title.
“It wasn’t really a pleasant feeling on the court. I don’t want to talk in details about my injury and just whine about not managing to play my best,” he said.
“I don’t think it’s bad fortune. It’s just age, the wear and tear of the body.” (AFP)