You should do the calf conditioning before going back on the tennis courts especially if your life style tends to shorten/tighten the calves.
Did you see a Dr? Did you have any imaging that located your injury? Physical therapy?
What has happened, running activities, etc. in the months since your last reply in January when you were about to use a ball machine?
Great to hear that you are back as calf strains sound like difficult injuries to deal with.
Last edited by Chas Tennis; 07-19-2012 at 01:56 AM.