Dallas Mavericks owner Mark Cuban isn’t scared off by New Jersey Nets head man Mikhail Prokhorov.

After the 6-foot-9 Russian billionaire jokingly threatened to inflict pain on Cuban if the Mavericks make a play for soon-to-be free agent guard Deron Williams, Cuban fired back – well, sort of.

“He obviously didn’t see me be the first in WWE history to put Sheamus on the mat,” Cuban e-mailed ESPN Dallas, referring to a guest host role on “Monday Night Raw” in 2009.

“He knows not what he gets himself into.”

Prokhorov is serious, however, in re-signing Williams.

“Let the best man win,” Prokhorov said. “If (Cuban) wins, I will crush him in a kickboxing throwdown.”