Prediction:
Ma Long def. Li Ping 4-1
Freitas def. Pucar 4-1
Wong Chun Ting def. Chuang Chih Yuan 4-3
Zhang Jike def. Niwa 4-1
Xu Xin def. Fang Bo 4-2
Liang Jingkun def. Karlsson 4-0
Ovtcharov def. Yoshida 4-1
Fan Zhendong def. Robles 4-0
Freitas will be a big step up in class from Alamiyan. Pucar might steal a set but no more in my opinion.
Ovtcharov should feel more comfortable against Yoshida than he did against Jiang Tianyi, should be pretty straightforward.
Can't see Karlsson troubling Liang Jingkun. If he gets a set it will be early on while LJK is still adjusting to an unfamiliar style, but Mattias tends to do a lot of damage in backhand to backhand rallies, where someone like LJK will have the upper hand comfortably (unlike Samsonov). My money is on 4-0.
WCT-CCY is a toss up.