Pakistan's Twenty20 captain Shoaib Malik has vowed to "expose" Mohammad Yousuf after the Test and one-day skipper's public criticism of him.
After recent poor results under Yousuf, he blamed divisions in the team on one unnamed player and said the team had suffered since Malik was made captain.
"Yousuf's made some serious allegations against me and this time I am going to expose him publicly," he said.
"I've always been a team man and have done nothing to spoil the atmosphere."
Malik was named captain of the Twenty20 side for the upcoming two-match series against England after regular skipper Shahid Afridi was banned after biting the ball in a one-day match against Australia.
He said Yousuf was trying to reopen an old dispute, dating back to his previous time as captain.
"Yousuf attacked me first when I was captain in 2008 and he is doing it again now when I have been made captain for the two matches against England," said Malik.
Yousuf said the Pakistan Cricket Board had "made a big mistake" in appointing Shoaib as captain.
"It was during his captaincy that the culture of groups within a team took root and respect for senior players fell," he said.