Mind though Wimby do their own seedings partly based on results on grass - or have you already taken that into account?
I have, that's why I said bonus points. If he only wins 2 matches and get 45 pts, that's not enough to make any change in his ranking pts since his lowest 250 is 90 pts and winning 2 matches only gives him 45 pts. But it also gives him additional 45 bonus pts and that's the pts that will push him up in the seedings. These of course assumes that Almagro doesn't beat Rafa the next match (almost a certainty though). And Almagro didn't sign up for any grass tournament next week so he has no chance of adding any bonus pts.
I assume my calculation is correct, no guarantee though