Boxer Kostya Tszyu’s Carss Park mansion under offer as former champ aims to knock out suburb record

The Carss Park mansion of the champion boxer Kostya Tszyu and his wife, Natasha, is under offer after its weekend auction following post-auction negotiations.

It had been listed with $3 million-plus auction hopes and passed in at $3.25 million through Mark Kourouche of First National Real Estate Greenacre.

There were six registered birders, with four bidders involved.

The highest price paid in Carss Park was $2.45 million in late 2008 for a five-bedroom, seven-bathroom house on a 1,865-square-metre Gnarbo Avenue block.

The Russian-born Tsyzu has never officially retired, although he hasn't fought since 2005.

His six-bedroom, eight-bathroom residence has been renovated and extended since the couple bought it for $785,000 in 2000. He had previously lived at Sans Souci.

The 2,400-square-metre Benwerrin Avenue property has resort-style facilities including a tennis court and heated saltwater pool.