Sanji using his power up still couldn't do significant damage to P1. Compare to G3 strike from Luffy which did more damage than Sanji did with his RS.
A normal swipe from P1 (not direct hit) actually made Sanji feel pain.
Hence it is entirely possible for Sanji's final fight to be vs an F6. Since with his RS he couldn't significantly damage P1
*Sigh* It's seems like I have to destroy your headcanon once and for all
In this panel down here, Sanji jumps up and attacks Page on the cheeks with a base kick
And this is what happen after Page ate a base kick from Sanji:smithnie:
You can see the blood right there
And if you thinks anime is canon then Sanji did make Page bleed in the episode
While up here, Luffy's Gear 3 Haki named attack did make Page bleed but he didn't turn into Hybrid form unlike Sangoro did
So yeah, take your L bro:holdthisl: