Zimbabwe were consigned to another defeat on their miserable tour of Bangladesh despite a record-breaking innings from Malcolm Waller in the first Twenty20 international on Friday.
Bangladesh won all three one-day internationals and stand on the brink of another whitewash after securing a four-wicket win in Mirpur.
Waller hit the fastest T20 half-century for Zimbabwe in an entertaining knock of 68 from 31 balls - including six sixes - but lacked support as the tourists were bowled out for 131.
Tamim Iqbal top scored with 31 as Bangladesh got home with 14 balls to spare despite the best efforts of Graeme Cremer (3-29) and Tendai Chisoro (2-15) at the Shere Bangla National Stadium.
Tigers captain Mashrafe Mortaza (2-20) made the most of winning the toss by claiming two early wickets, with Zimbabwe slumping to 10-3 in the third over.
Sean Williams (15) was bowled by a Nasir Hossain (1-29) delivery which kept low after being dropped by Mustafizur Rahman (2-16) off his own bowling, but Waller and Craig Ervine (20) put on a much-needed 67 for the fifth wicket.
Waller brought up his 50 off only 20 balls, taking 17 from T20 international debutant Jubair Hossain's over and then hitting another two sixes and as many fours in the next from Nasir.
Jubair responded well as he and Al-Amin Hossain each took 2-20 and Zimbabwe lost their last six wickets for 26 runs.
Anamul Haque was run out in the first over of Bangladesh's run chase for one, but Tamim scored at just over a run a ball as the hosts always looked favourites to get home.
Chisoro and Cremer struck in quick succession to get rid of Sabbir Rahman (18) and Mushfiqur Rahim (2) respectively and reduce the Tigers to 54-3 after seven overs.
But Mahmudullah made 22 not out and Mortaza smashed Luke Jongwe (0-24) for six to finish off the job and add to Zimbabwe's woes.