Powergirl vs Wonder Woman - The most powerful heroines of JLA
{edited image because it was ridiculous}
Round 1: Wrestling only. No armor, no gear, no clothes, and it's raining outside in a 1 foot tall shallow lake. No other powers allowed.
Round 2: Thumb wrestling. Best 3 out of 5 wins.
Round 3: Arm wrestling. Takes place on an indestructible table in the Watchtower, designed for Superman and Captain Marvel
Round 4: Boxing. Takes place in a boxing ring in the training room. Typical boxing rules apply, with gloves made for people of their strength and might. Powers besides physicals is restricted.
Round 5: Tongue wrestling: Best 3 out of 5
Round 6: All-out fight. Wins with KO or submission.
Round 7: Eating contest (hotdogs). Last one standing wins