Sharjah, UAE: Afghanistan defeated Zimbabwe by five runs in a thrilling Twenty20 clash on Friday to follow their triumph in the one-day series.

Chasing 188 to win, Zimbabwe fell just short when Luke Jongwe, needing a six to win, was dismissed off the last ball of the match.

It was a controversial finish, however, after Afghanistan seamer Dawlat Zadran was allowed to keep bowling the final over despite having sent down two waist-high full tosses.

Jongwe was caught by Gulbadin Naib out in the deep to leave Zimbabwe on 182-7 in their 20 overs.

Malcolm Waller was the not out batsman on 49 with two sixes and two boundaries off 37 balls. Zadran finished with 3-32 off his four overs.

Afghanistan had won the toss and chose to bat, making 187-7 in their 20 overs.

Usman Ghani top-scored with 42 off 38 balls with a six and five boundaries while man-of-the-match Naib made 37 and Mohammad Shahzad, 33.

Veteran off-spinner Graeme Cremer returned impressive figures of 3-17.

Afghanistan skipper Asghar Stanikzai defended Zadran's bowling, blaming the last-over beamers on the late-night damp which made it difficult to hold the ball.

"It's a funny game. The dew was too much, that's why the two beamers," Stanikzai told cricinfo.com. "Otherwise he's a good bowler."

Zimbabwe captain Elton Chigumbura said his team were not happy with some of the officials' decisions.

"Some of the decisions, you can't really control them, but I thought we had a good chance, obviously, if other things went our way, which I can't mention," he said.

The second and final match takes place at the same venue on Sunday.

Brief scores: Afghanistan 187-7 (Usman Ghani 42, Gulbadin Naib 37, Mohammad Shahzad 33; Graeme Cremer 3-17) v Zimbabwe 182-7 (Malcolm Waller 49 not out, Hamilton Masakadza 33; Dawlat Zadran 3-32)