Hyun Joong was asked whether will he win against Yoon Hyung-bin.

Given the title as 'Sirasoni' for his character as Shin Jung-taein the drama, Hyun Joong was asked whether will he (as KHJ himself) win against Yoon Hyung-bin.

He said, 'If I were to fight with Yoon Hyung-bin, it feels like I will lose in the fight.' 

Continuing being questioned if his character, Shin Jung-tae, was to battle against with Yoon Hyung-bin, Hyun Joong answered, 'Wouldn't Sirasoni win? Don't you think Sirasoni last time is up to par to the standard with the present-day's UFC fighter, Fedor Vladimirovich Emelianenko?
cr:@5StarsAs1
Source: http://media.daum.net/entertain/enews/newsview?newsid=20140304142308148
P/S:

1) Yoon Hyung-bin is previously a comedian in KBS2's Gag Concert, but debuted as a MMA fighter in Road FC fight held on February 9th, 2014. He won his first debut fight against Japanese fighter, Takaya Tsukuda

2) Sirasoni is a nickname given to a Korean legendary fighter called Yi Sung-soon who was a well-known best Korean martial artists (or street fighter) during the Japanese Occupation era. It is also thought to be Shin Jung-tae's character in the drama.

3) Fedor Vladimirovich Emelianenko - you can check out more about him here: http://en.wikipedia.org/wiki/Fedor_Emelianenko