England won by six wickets after a Pakistan batting collapse featuring three run-outs in Sharjah on Tuesday.
The Daily Mail reported that the match was the subject of an investigation into suspicious betting patterns.
"There was nothing wrong with that game. I have no doubts about my boys," said former bowler Waqar.
The ICC declined to confirm or deny that it was investigating the game.
Pakistan collapsed from 132-2 to 208 all out before England triumphed with nine overs to spare.
Waqar said: "Yes, we lost the game. You lose and win games, and it's unfortunate the way the whole thing happened."
ICC chief executive David Richardson told BBC Test Match Special: "I wouldn't be suspicious of that game."
He said Pakistan had reported approaches from bookmakers in recent times.

At the top, but not in the inner circle.
As the first Muslim woman to sit in the cabinet she was a crucial symbol of David Cameron's efforts to modernise the Tories.
But now she has left the government - and in a way designed to inflict damage.
The prime minister was only told shortly about her decision to quit before she announced it on her Twitter feed.
She'd also done an interview, explaining her decision, which was published on the Huffington Post website within the hour.
David Cameron's response to her resignation contained a jibe - he had "much regret" she hadn't talked to him about her concerns before she quit.
But there was also a warm tribute.
"I would like you to know how much I have personally appreciated your support and friendship over the years' he wrote.
There is no evidence though that Mr Cameron is changing his mind or re-assessing the government's stance on Israel's conduct during this war.
The prime minister has faced criticism from some in his own party for not condemning Israel for what they believe is its disproportionate use of force against Hamas and civilians in Gaza.
He described an attack on Monday as a "slaughter" and he said the situation was "intolerable".
Other senior ministers have called it a "catastrophe".
But neither Mr Cameron nor any Conservative minister has said that Israel has gone beyond what is proportionate.
The response on Tuesday afternoon from the new foreign secretary, Philip Hammond, was telling.
What Lady Warsi has labelled a "morally indefensible" position he has dismissed as a call for "megaphone diplomacy". He emphasised that he felt he had to be "balanced".
That reveals how deep the divide was between two people who were supposed to be working together.

The money will be used to create 35 new posts across Northern Ireland in an effort to speed diagnosis and cut waiting lists.
Since 2010, the number of referrals for autism assessments has nearly doubled in five years from 1,500 to 2,800.
More than 2,800 children are currently waiting to be seen. Health Minister Simon Hamilton said it was "unacceptable".
He told Radio Ulster's Sunday News that the extra cash should help match pace with demand.
"The impact of the additional money should be felt very quickly," Mr Hamilton said.
"We are going to create about seven posts in each of the five health trusts across Northern Ireland to supplement the hardworking teams that are already there doing a great job and to give them much needed resources to be able to carry out the diagnoses."
Mr Hamilton said waiting lists resulted from "huge pressure" on the system.
Pakistan coach Waqar Younis has dismissed suspicions over his side's performance in the third one-day international against England.
[NEXT_CONCEPT]
Sayeeda Warsi has been a permanent feature at the top of the Conservative Party since David Cameron became leader almost a decade ago.
[NEXT_CONCEPT]
Autism services in Northern Ireland are to get an extra £2m a year.