The second-round matchup between Iowa and West Virginia in the NCAA women's basketball tournament averaged 4.9 million viewers with a 2.7 rating on ESPN.
The number represents the largest audience ever for a NCAA women's tournament game prior to the Final Four.
The game peaked with 6.4 million viewers.
Iowa won the matchup 64-54, with Caitlin Clark finishing with 32 points.
Iowa's first-round game averaged 3.23 million viewers on ABC.