I've been there, too... seems many of us have. Mine was frustrating because it was mild and I came back too soon, only to have it act up and prolong recovery. Took about 6 weeks total. One thing that really helped during recovery was massaging it with a rolling pin (although my wife made me buy her a new one after I was through with it.
Should've just bought a calf roller)
In addition to doing toe raises during my off-court workouts, I've added eccentric calf exercises, mainly to fend off achilles tendonitis, and they have helped keep the calf problem away as well.