Mark Waugh says failure in the Test series against Pakistan later this year could signal the end of his Australia career.
Waugh, speaking at the launch of his autobiography on Thursday, said he hoped to regain his place in the one-day side in time for next year's World Cup but added: "First of all I've got the Test series against Pakistan.
"If I don't perform there, I could be on my last legs for Australia. I'm confident I can do well."
Australia are due to play Pakistan away in October before hosting the Ashes at the turn of the year.
The 37-year-old, who has played 125 Tests and 244 one-day internationals, said he felt lucky to have been part of an Australian team which won the 1999 World Cup as well as a world record 16 consecutive Test wins.
"Just because I'm bringing out a book doesn't mean it's the end of my career," he told reporters at the launch of "Mark Waugh: The biography", adding: "I'd like to play for another couple of years."
Mark Waugh yesterday conceded the revival of his one-day career could come at the expense of his twin brother, Steve.
Now that both are out of the side, Waugh said it would be a big ask for the selectors to reinstate him and his brother.
"I think it would be a better chance that one of us got in," Waugh said.
"For two of us to get back in is a big ask. But it depends on form and fitness of the other players - there's a lot that comes into it."
Coincidentally, Waugh gained his first chance in international cricket at the expense of Steve.
He was speaking at the launch of his book Mark Waugh: The Biography in Sydney.
Waugh has no illusions about his future in international cricket should he fail to perform in the Test side.
"I'd love to be at the World Cup," Waugh said.
Former Australia cricket captain Greg Chappell's son Jon has signed to play as a catcher with American League baseball team Toronto Blue Jays.
Greg Chappell and his Test cricketer brothers Ian, also a former captain, and Trevor all played representative baseball.
"He (Greg) let me choose myself. He was happy with whatever I chose because he played baseball as a kid and so did his brothers," Jon said.
"I love watching Test (cricket) matches, they're awesome but baseball is what I enjoy playing more.
"I'm overjoyed to have been given the opportunity," the 22-year-old said of his six-year deal.
Jon said his father Greg and uncle Ian, two of Australia's toughest cricketers, had advised him on how to handle the heat of battle.
"Every time I talk to them I get some tips and some comments, they're all good," he said.
Despite the two outstanding innings in the first Test against England at Lord's, V V S Laxman will continue to bat at number six, according to team sources.
Australians topped the latest individual bowling and batting Test rankings while Indian icon Sachin Tendulkar fell to his lowest level in almost five years.
All rounder Abdul Razzaq and off-spinner Saqlain Mushtaq return to the Pakistan team for the tri-series in Morocco after missing the Australian tour, Pakistan Cricket Board announced on Friday.
Sussex are set to hold talks with Harbhajan Singh this week with a view to signing the Indian off-spinner as their second overseas player next season.