Rian Scalia posted an article about upcoming fights, one of which is a "winner takes all" bout between Simon Marcus and Joe Schilling.
Marcus is a top fighter with a solid pedigree. He comes from Siam No. 1, possibly the finest Muay Thai gym in North American. (They have a reputation for putting out very well-prepared fighters). He turned pro not too long ago, after capturing a number of amateur belts, including the IFMA title and the SportAccord Games <81kg gold in Beijing.
This fight, from a San Da vs Muay Thai event in China, showcases Marcus's strong, traditional Muay Thai technique. For those who understand Chinese, the commentating is also fairly (and unintentionally) hilarious for reasons of racism and blatant national bias.
Marcus is in the black and gold, and Guo is in red.
(Edit: This is actually a rematch. Guo and Marcus fought on another San Da vs Muay Thai show in a one-sided, and I mean VERY one sided, beatdown (Guo landed maybe twenty strikes over five rounds.) Why they were matched again, I don't know. Guo had a slight knee injury in their first bout, so maybe the promoters thought he would do significantly better next time. If that was the case, he blew their minds by doing significantly worse.)