If he's got something wrong with a quad muscle...he needs to rest and rehab it. Pushing it this early in the season is not wise. If it's tight because of hydration, that's one thing...if it's tight because of a pull/tear, that's something else. I know he's playing great right now. But, more importantly, we need him to be playing great several months from now.
And that fall he had was nasty. Wouldn't be surprised if he's got some serious bruising going on this weekend. It's sorta scary to see him going this all out...this early.
Stay healthy Manu.