The only reason why you beat sepi it's because he keep close himself since a couple days.
Hes proud of his master title and his ladder ranking.
By this fact he act like a pussy and dont play anymore cuz hes scare to lose and lose everything.
But acting by this way just bring him to corrupt is own progression.
Still, good job, but i will not be suprise to see you lose in a couple days if you dont dodge.