When he gets to 100%, which he should with a few weeks off, he'll be fine. Also if he wins in Davis Cup he'll gain confidence. He should win the Blumenau challenger in three weeks to regain top 100 status.
What's more important is he makes the French Open direct, and it won't take a top 100 ranking to do that, especially since Ljubicic and Soderling won't be playing and Haas will be out of PR
's by then.