Dmitry Yun was knocked down twice, but was still able to edge out a six-round unanimous decision over Javier Martinez in a lightweight bout.
Martinez was docked two points for spitting out his mouthpiece.
Yun, 135.4 lbs of Chelyabinsk, RUS won by scores of 57-54 twice and 56-54, and is now 2-0. Martinez, 134.5 lbs of Austin, TX is 4-7.