He will lose 9 points from Viña and 5 from Costa. And in that Memphis week he will need to win his first round to add a couple of points (10 points with a first round win, 35 with a QF spot).
Where do you get those numbers from?
As I understand it, Del Potro got 15 points from the second round in Viña, 5 points from the first round in Bs.As. and 10 points from the first round in Costa do Sauipe after coming off the qualies.
Maybe I am wrong but I think Memphis gives 25 points for a first round win (thats reaching R/16) and 60 for a QF.
Am I missing something?