His statline is not out of world - 20 points, 24 rebounds and 2 assists (on 66% TS). When you add that he blocked 9 shots and held Kareem to 43.2% FG and 47.2% TS, it looks far more impressive. He also led Lakers to a comeback in 4th quarter with 9 points.
Here are some reports:
Wilt had 22 points on 8-for-12 (66.7%) shooting, 24 rebounds and nine blocked shots—five of them on Kareem, and held Kareem—who had 37 points on 16-for-36 shooting (44.4%), 25 rebounds and eight assists—to 2-for-8 shooting (25%) in the game’s final 10 minutes as the Lakers won 104-100 to advance to the NBA Finals. West scored 12 of his 25 points in the fourth quarter, and Chamberlain nine, as the Lakers came back from a 10-point deficit.
TIME magazine wrote: “In the N.B.A.’s western division title series with Milwaukee, he decisively outplayed basketball’s newest giant superstar, Kareem Abdul-Jabbar, eleven years his junior” (“One for the Dipper.” TIME. 22 May 1972.
As Chamberlain put it after the fifth game in Los Angeles, which the Lakers won, 115-90, “Tonight Kareem was taking jump shots. That’s something he doesn’t usually do, but I hope he keeps on doing it.”
Abdul-Jabbar took more jump shots Saturday as the Lakers ended the series with a 104-100 victory, and Bucks Coach Larry Costello said, “I don’t want Kareem taking 15 footers. You do that and you’re just not playing your game.”
But Chamberlain’s dominating presence obviously had much to do with Abdul-Jabbar’s change in tactics, and Wilt’s performance against the man who supposedly had usurped his title as king of the giants must have been one of the most satisfying of his long career.
(Bob Wolf. “Kareem’s Image as Best Suffered in Buck Defeat.” The Milwaukee Journal. 24 Apr. 1972)
Do you think that this performance is underrated/forgotten? I think that this is one of Wilt's defining moments, even as an old man he outplayed arguably the best player ever in elimination game.
As a sidenote, I want to mention that it's possible to get some footage from that game. It's here, on AP Archive (It's 18 minutes long):
http://www.aparchive.com/metadata/c0026854/4e9e07e327b7826a704b26af825cef54