The injury-prone 31-year-old paceman is back in the Pakistan team after missing the World Cup in the Caribbean earlier this year due to knee problems.
"My best comes against Australia. I am confident that I will keep fit and help my team beat Australia," Akhtar told AFP late Tuesday as a 14-man Pakistan squad left for Scotland.
Pakistan play hosts Scotland in Edinburgh on July 1 before taking on arch-rivals India in Glasgow two days later.
The mercurial bowler, who played just one Test this year due to nagging injury problems, said he enjoyed facing India but added that playing Australia boosted his performances.
"It is always exciting to play against India. But Australia bring out the best in me," said Akhtar, whose last full series was against the traditional rivals last year.
Pakistan are also due to travel to India later this year.
"I am gearing up for the full season. I hope I keep fit and play a lead role, especially in our home series against Australia," he added.
Pakistan host Ricky Ponting's men early next year. They have not beaten Australia in a Test series since their 1-0 win at home in 1994.
Akhtar's three appearances against Australia 1999, 2002 and 2004 each ended with Pakistan losing 3-0.
"I know my fitness will play a major part, but I am confident that I will play my role this season as we have three very important series," said Akhtar, who was also at the centre of a doping scandal last year.
He and fellow paceman Mohammad Asif were banned for two years and one year respectively after they tested positive for the banned steroid nandrolone. The bans were controversially lifted a month later.
An appeal by the World Anti-Doping Agency (WADA) against the overturning of the ban is still pending in the Court of Arbitration of Sport in Switzerland.
But Akhtar said he had put last year's problems behind him, adding that a stint at a Pakistan army training camp earlier this month had worked wonders.
"This is the best I have felt in my entire career," said Akhtar, who had twin knee operations last year. He then damaged his hamstring on a tour of South Africa, where he was sent in as a reinforcement.
"I hope this is a new start for me and I will do my best to play continuous cricket. I know what is required of me in Tests as well as in one-day internationals and I am ready to play my part."