Duke coach Kara Lawson said the teams played with a men's basketball for the first half of a loss to Florida State on Sunday.
The 16th-ranked Blue Devils lost to the Seminoles 70-57 in Tallahassee, Florida -- the team's second Atlantic Coast Conference loss of the season.
After her team beat Pittsburgh 53-44 on Thursday, Lawson ended her news conference by speaking animatedly about Sunday's game.
"This would never happen in a men's game. This would never happen," she said. "It's embarrassing for our sport."
The circumference of a women's ball is about an inch smaller than a men's ball, and it is typically 2 ounces lighter.