It depends on various factors. Saitama's raw power is immense, but Dark Saitama might have some strategic advantage or unexpected abilities. It could be a very close fight.
If you want the clearest chapter reference, go to Chapter 102. Early on, When the camera cut back, the three of them had already returned to the...; later, the chapter leans on The mud on Jiang Yan's body had dried mostly from the wind, and he walked....
A practical answer is Chapter 115, because it turns the idea into a concrete scene. The chapter opens with Jiang Yan was woken by a loud crowing noise., adds pressure through Looking back now, the rebelliousness and obstinacy in his bones were..., and ends on [Pure bystander, wasn't Jiang Yan.
A practical answer is Chapter 110, because it turns the idea into a concrete scene. The chapter opens with Jiang Li, carrying a wooden basin, walked over to the well., adds pressure through As she hesitated whether to call directly to explain the situation, the..., and ends on My parents died, and.
A practical answer is Chapter 114, because it turns the idea into a concrete scene. The chapter opens with As time passed, the number of viewers in the live broadcast gradually..., adds pressure through I've never seen someone so shamelessly clingy!], and ends on But just now, an uncle came and.
If you want the clearest chapter reference, go to Chapter 116. Early on, But before the audience in the live room had time to continue brewing the...; later, the chapter leans on Jiang Yan quickly entered the room, and a few minutes later, he dashed out....
Chapter 138 is the strongest chapter-level answer because it starts from Is there such a good deal? and follows through on Could it be that the poison also had a side effect of making a person more....
If you want the clearest chapter reference, go to Chapter 120. Early on, Facing the sudden and somewhat strange request from Jiang Li, Director Sun...; later, the chapter leans on But, as if by some mysterious force, he still instructed his assistant to....
A practical answer is Chapter 162, because it turns the idea into a concrete scene. The chapter opens with He Yun then realized what was happening and subconsciously wanted to check..., adds pressure through Why mention someone else in Wanwan's live stream?, and ends on Having heard the news.
Chapter 121 is the strongest chapter-level answer because it starts from Seeing that Wen Jiaojiao's condition had improved significantly, Director... and follows through on You're supposed to be a man who conquers mountains!] Experienced and....
If you want the clearest chapter reference, go to Chapter 137. Early on, Jiang Li personally went to Lai Fu's tomb and performed a small ritual.; later, the chapter leans on After it was finished, she took out talisman paper and gently waved it....