Ryan Harris keen to keep body together for 2015 series Fit and firing: David Warner (left) and Ryan Harris at the SCG on Saturday. Ryan Harris has set himself the ambitious goal of playing in another Ashes series. Just one innings away from completing his ninth consecutive Test, Harris has warned England's shellshocked batsmen they may have to face him again next year when Australia head over to defend the urn. Harris, who will be 35 by the time of the next Ashes campaign, will have to keep his ageing frame together for at least another 18 months and must survive 12 Tests over four series if he is to achieve his goal. "I'm a chance, simple as that," said Harris, who has previously stated he treats every Test as his last given his long history with injury. The burly quick will require knee surgery at some point, which he hopes to put off until after the tour of South Africa, but believes it can prolong his career by "another year or two." "That's a goal of mine," Harris said of the 2015 Ashes in England. I was hoping to get through this series and then reassess. I've spoken to the coach and he's keen to have me there, and the captain. That's a long way away, get through the rest of this Test and South Africa and worry about what happens from there. I'd love to have one more trip to England to try and defend the Ashes. That would be just amazing. Harris led the charge for Australia on the second day, capturing the wickets of Alastair Cook and Kevin Pietersen in an inspired spell with the new ball. But it took a searching effort by Peter Siddle, who claimed 3-23 and now has 16 wickets at 23, in the afternoon to cut through some rare resistance by England's batsmen. Having earlier claimed the wicket of Ian Bell, the player of the series in England, Siddle removed Ben Stokes and Jonny Bairstow during a typically lion-hearted seven-over spell when the ball had lost its lustre and the sun was at its fiercest. That his two wickets came towards the end of his spell should also help dispel the theory his vegetarian diet, which includes some 20 bananas a day, has stripped away at his power and constitution. "He cops a little bit of criticism every now and then because he's not getting wickets or he's not bowling as quick as he used to; he's still doing that and he's still had some balls up there today that were quite quick," Harris said. It was a crucial time in the game. Not much was happening with the partnership they had and he came in and broke it. Conventional wisdom has it that Siddle will be the man to make way for his close friend James Pattinson for Australia's next Test but it will take a brave selector to force him out. Harris said Siddle's ability to bowl for long spells provided the perfect foil for him and Mitchell Johnson - who are both saved for shorter bursts. Siddle, who has played 19 of Australia's last 20 Tests, was Australia's leading wicket-taker in each of the past two years during which he has been a fixture inside the ICC's top 10 bowling rankings. "You need Peter Siddle in this Australian cricket team for as long as you can," Harris said of the 29-year-old. He's a warhorse and he picks up wickets at tough times when there's partnerships going on and he does that through the whole series. He gives Michael the option to bowl those long overs. Sometimes I can do that, depends how I'm going, but he's more the one out of the three of us who is going to do that.