Bangladesh are three wickets away from a famous Test series win at home after spinner Taijul Islam took 4-113 to rattle Pakistan despite a rearguard by the opposition batters on Tuesday. Pakistan ended day four on 316-7, needing another 121 runs for victory in what would be a record chase of 437 on the fifth and final day in Sylhet. Mohammad Rizwan, on 75, and Sajid Khan, on eight, were unbeaten at the close of play.