We will know in a week or two. The following is how it all looks, for now. Will update this soon. If he plays at Hartford and decides to practice doubles the week before, then he may be down to just 2 weeks when he could play singles at a challenger. It won't be easy to defend 130 points with that few tournaments.
Tiebreakers are a funny thing.
He likes the fast hardcourts at US Open. Count on him winning a doubles title there very soon, and I bet it will be with Mahesh. I don't think there are enough big tournaments left for enough teams to enter the top-8 to push them out. They both should be in India for the next three weeks. Both the beijing and the Singapore tournament are on Indoor Carpet.