Younis Khan reached his double century with a six and immediately declared its second innings on 419-9, a lead of 341 over Zimbabwe on day four of the first test on Friday.
Younis just made it to 200 not out before the planned declaration from captain Misbah-ul-Haq, leaving Zimbabwe way behind and just over three sessions to survive in the series opener.
Younis hit 15 fours and three late sixes in his double hundred, and shared century partnerships with Misbah and Adnan Akmal (64) to lift out of trouble after the tourists trailed by 78 runs following the first innings.
Younis was almost solely responsible for the turnaround, facing 404 balls and taking from 23-3 early in its second innings to a position of dominance.