Fed will never get #1 back. Nor will he get #2 back. He's lucky to be in the Top 3 the way he's been playing since the AO.
QF at French Open, final in Halle, QF at Wimbledon, Toronto final, Cincy win and USO semifinal. And probably very likely to reclaim his #2 ranking if Nole can't defend his Shanghai or Paris points.