Fast bowler Dwaine Pretorius recorded the best figures for South Africa in the shortest format to help his team beat Pakistan by six wickets in the second Twenty20 international in Lahore on Saturday.

The 31-year-old grabbed 5-17 to keep Pakistan down to 144-7 in 20 overs before Pite van Biljon (42) and Reeza Hendricks (42) took South Africa past the modest target in 16.2 overs.

It was a canny performance by Pretorius who marginally improved on the previous best figures by a South African, 5-19 by medium pacer Ryan McLaren against the West Indies at North Sound in 2010.

Mohammad Rizwan top-scored for Pakistan with a 41-ball 51 laced with six boundaries and a six while Faheem Ashraf hit two boundaries and as many sixes in his 12-ball 30 not out.

Pakistan's lanky paceman Shaheen Shah Afridi gave his team an ideal start by dismissing Janneman Malan with the second ball of the innings and Jon-Jon Smuts in the following over, finishing with 2-18 in three overs.

But Hendricks and Biljon punished some erratic bowling during their 77-run third wicket stand before both fell in successive overs.

Hendricks, who hit three sixes and as many boundaries in his 30-ball knock, was finally caught off leg-spinner Usman Qadir in the 12th over. Biljon hit two sixes and three boundaries off 32 balls before he returned a gentle leading edge back to left-arm spinner Mohammad Nawaz.

David Miller (25 not out) and skipper Heinrich Klaasen (17 not out) added 40 in an unbroken fifth wicket stand to see their team across the line.

“I am happy that I have contributed to the victory,” said Pretorius. “We had a plan in bowling and we executed them well for this nice win.”

The series decider will also be in Lahore on Sunday.

“It will be a big night on Sunday and I hope that we can pull off a series win,” said Klaasen.

Pakistan were once again lifted by Rizwan who followed his 89 against New Zealand in December and 104 not out in the first match with another superb knock.

After losing the toss, Pakistan skipper Babar Azam opened the batting but was soon on his way back to the pavilion as Pretorius trapped him leg before in the second over.

At 48-6, the home side were struggling but Rizwan, who became only the fifth Pakistani batsman to score three consecutive T20I fifties, added 45 for the fourth wicket with Iftikhar Ahmed who made 20.

Mohammad Hafeez (twice), Shahid Afridi, Umar Akmal and Azam have previously hit three fifties in successive T20I matches.

Rizwan finally departed for 51, holing out to Andile Phehlukwayo after falling for a Pretorius slower ball.

Pretorius also removed Iftikhar and Khushdil Shah for 15 before yorking Nawaz for a second-ball duck, as he took more than one wicket for the first time in his 13-match T20 international career.

Playing 11

Pakistan: Babar Azam (capt), Mohammad Rizwan (wk), Haider Ali, Hussain Talat, Iftikhar Ahmed, Khushdil Shah, Mohammad Nawaz, Faheem Ashraf, Usman Qadir, Shaheen Shah Afridi, Haris Rauf

South Africa: Janneman Malan, Reeza Hendricks, JJ Smuts, Pite van Biljon, David Miller, Heinrich Klaasen (capt, wk), Andile Phehlukwayo, Dwaine Pretorius, Glenton Stuurman, Lutho Sipamla, Tabraiz Shamsi