Jingzhun Zhuangji

Qiu Ning, an apathetic snooker genius who grew up in a pool room, once faced off with Cheng Haiyan - a pool shark of the same age. Despite losing for the first time in his life, Qiu Ning's talents in snooker astonished Cheng Haiyan. Qiu Ning subsequently decided to train under the snooker club where Cheng Haiyan serves in order to beat him and hence enters the world of professional snooker...

(Source: Webcomics)

Note: Chapter count includes a prologue and 3 extra chapters.