Anna Kournikova throws down in Vegas

Tennis player Anna Kournikova has a wicked backhand and it came in handy when she was involved in a brawl in a Las Vegas nightclub on Saturday.

Kournikova, who is dating singer Enrique Iglesias, was partying with friends at nightspot Lavo when a fellow partier took offense at the group’s behavior.

According to New York Post gossip column PageSix, the woman felt “Anna was invading her space,” and threw a drink on Kournikova.

The publication claims a fight ensued when Kournikova “sprung into action” and started to push and shout at the woman – before the reveller was kicked out.

A source told the column, “It was a big fight.”