Caitlin Clark is already delivering for the WNBA — she put on a killer performance in her first preseason game, scoring basket after basket … in front of a packed arena.

The basketball phenom was the center of attention Friday night as she and her Indiana Fever teammates battled the Dallas Wings to a sold-out crowd at College Park Center in Arlington, Texas.

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Clark racked up 16 points in just the first half, topping all the other players. She cooled off in the 2nd half, finishing with 21 points … but, remember, it was just a preseason game, so players and coaches aren’t exactly going all out.

CC also had 3 rebounds, 2 assists, and 2 steals as her Fever narrowly lost to the Wings in a 79-76 nail-biter. Caitlyn’s chief rival on the Wings, Jaelyn Brown, had an equally impressive game, also scoring 21 points.

But points aren’t really what the WNBA wanted outta this game … it’s the fact Caitlyn’s presence fueled a sell-out of the 7,000-seat arena.

As you probably know, Caitlyn was a two-time NCAA women’s basketball player of the year while attending the University of Iowa — and her squad made it to the National Championship last month before losing to undefeated South Carolina.

Caitlyn was already launched into superstardom by that point … and, as everyone predicted, was drafted number 1 by the WNBA’s Indiana Fever.

Caitlin Clark -- On The Court

CAITLIN CLARK — ON THE COURTLAUNCH GALLERY

She’s so popular that many fans — wearing her No. 22 University of Iowa jersey — stood in line for more than 3 hours outside the stadium last night waiting to see her play.

All that popularity, all the fans showing up and buying merch … it all makes one sound for the WNBA: cha-ching!!!