Pakistan team manager Intikhab Alam has described new suggestions of ball tampering as "disappointing".
It has emerged that New Zealand spoke to match officials to clarify that Umar Gul's haul of 5-6 in their Super Eights clash had been achieved fairly.
But the matter will go no further after officials assured New Zealand they had no concerns over Pakistan's conduct.
Gul's record Twenty20 haul came at The Oval, where Pakistan were accused of ball tampering against England in 2006.
Pakistan forfeited the Test when they refused to retake the field in protest over a five-run penalty handed out by umpire Darrell Hair, who believed they had tampered with the ball.
Gul's five wickets on Saturday helped dismiss New Zealand for 99 and set up a six-wicket win for Pakistan.
Intikhab said: "It is disappointing to hear these things. Umar Gul is a fantastic bowler.
"Not everyone can bowl a reverse ball, you've got to have a special ability to do that. He's quick and his action makes a lot of difference."
New Zealand captain Daniel Vettori stressed that his side were content with the officials' decision.
"It's important to note the position we were in when Gul came on in the 12th over. We were well and truly behind the game and Pakistan were dominating and would probably have carried on to win," Vettori said.
"But the amount of reverse swing that we saw was new to us and therefore we raised a couple of concerns with the on-field umpires and the match referee.
"They relayed back to us that they had no issues at all with the state of the ball and we accepted that and move on to the important game against Sri Lanka."