Gennady Golovkin, who looks to win another version of boxing’s middleweight championship tonight against David Lemieux, is known as one of boxing’s most fearsome competitors.

The undefeated Kazakh has amassed a 33-0 record, with a stunning 30 wins by knockout, since turning professional in 2006. Prior to that, he won the gold medal in the 2003 Worlds, and a silver at 2004 Olympics.

So, he knows a little something about boxing, and as it turns out — he’s a big fan of the UFC’s biggest star: one Ronda Rousey.

“I know her; we’ve been training maybe two, three times together in boxing gym,” Golovkin told MMAjunkie in a recent interview. “She is nice lady. She’s great athlete. She’s the best female athlete in the world. She’s a beautiful lady and beautiful person. I like her. She’s tough.”

Golovkin, also known as “The God of War,” was impressed with Rousey’s most recent performance: a one round demolition of Bethe Correia.

“Beautiful performance,” Golovkin said, adding that he agreed with Rousey’s being named ESPN’s “Fighter of the Year” in a recent ceremony. Golovkin and fellow boxer Floyd Mayweather, Jr were among the other nominees.

Golovkin will face Lemieux tonight in Madison Square Garden in New York. The event will be televised on HBO PPV.

Next month, boxing’s lineal middleweight champion Miguel Cotto will be in action against Saul “Canelo” Alvarez in a PPV event in Las Vegas. It is hoped the winner will face the winner of tonight’s bout.