Pietersen, 29, missed the last three Tests of the Ashes series, has played no part in the one-day matches against Australia and is already ruled out of the Champions Trophy.
The England trip to South Africa - for four Tests, five ODIs and two Twenty20s - was his projected target for a competitive comeback and, although his rehabilitation has not been speedy so far, he is still eyeing a return to the country of his birth.
"I saw a couple of surgeons during the week but it's slow at the moment. I've got an open wound in my leg," he told BBC Sport at the Italian Grand Prix.
"I'm really hoping to be back for the South Africa tour at the moment, that's still what I'm looking at."
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