Big-talking Tanzanian boxer Karim Mandonga has vowed to severely punish Kenya's Daniel Wanyonyi on Saturday at KICC'S Ball Room.

Mandonga arrives in Nairobi on Wednesday  night at 8pm and will address the media on Thursday outside the National Archives building from 11am.

The two boxers will battle it out in a 10-round super-middleweight supporting bout of Rayton Okwiri vs Ally Ndaro main 10-round non-title fight.

"I'm told Kenyans are saying Wanyonyi will knock me out because he has fought in  more bouts than me, they're in for a surprise," said Mandonga in a telephone interview from Dar es Salaam.

"These are the opponents I want, I'm not at all bothered by his record it's nothing to me. On Saturday he'll know why I'm Mandonga Mtu Kazi."

Mandonga says bombs will explode on the head of the Kenyan boxer. 

"Yaani Wakenya watashagaa Jumamosi waje kwa wingi waone Mtu Kazi.. Maanake nampiga na ngumi ziitwazo Sugunyo kutoka Ukraine, mabomu yatalipuka kwa Mkenya atalia machozi ya damu."

The Tanzanian boxer is unbeaten in four fights, one draw with two knockouts while Wanyonyi has won 27 fights (22 KOs), lost 14 and drawn two.