Robbie vows to win the Tour as fellow Aussie Cam Meyer takes the stage on day four

The Aussies are certainly proving their worth in the opening days of this years Tour as Cam Meyer snatched the coverted Tour jersey from the shoulders of compatriot Matt Goss. However it was Golden Coast veteran Robbie McEwan with his "model domestique" Lance Armstrong riding shotgun who vowed to win despite slipping into fourth place. With a record 12 Tour Down Under stages under his belt, the sprinter admitted it would be hard but not impossible to achieve.

''It is still not lost but if the sprinters want to fight it out among themselves they have to co-operate for there to be a battle,'' McEwen said ahead of the final two stages.

Armstrong yesterday joked he was being a ''model domestique'' for McEwen, who is just 15 seconds off the lead.

The team mates have pledged to ride the Twitter ride in Brisbane on Monday to raise awareness and money for the state which has recently been victim of massive flooding that has destroyed thousands of homes and lives.

Meyer who had started the day hopeful of a win admitted being overwhelmed when he ended the stage with his first leader's jersey and a 10sec lead over his nearest rival.

The young Aussie rider was part of a four-man break which dominated the 124km stage to Strathalbyn.

''To get the stage victory and throw my hands in the air over the finish line was just a great feeling. To get the jersey is unbelievable,'' he said.

As they head into the penultimate stage Meyer leads Belgian rider Thomas DeGendt by 10sec and Goss by 12sec.