(CNN) -- Quickstep rider Allan Davis has claimed his second stage win to increase his overall lead in the Tour Down Under, reports the race's official Web site.
Davis celebrates his second stage win to maintain his race lead in the Tour Down Under.
Davis held off sprint rival and fellow-Australia Graeme Brown (Rabobank) at the end of the 143km fourth stage from Burnside Village to Angaston, with Spaniard Jose Rojas (Caisse d'Epargne) third.
"This is an amazing result for me and the Quickstep team," Davis told the Web site. "I found something special with 1km to go. I just jumped on Brown's wheel and did an awesome sprint."
The win gives Davis a 10-second time bonus which split Thursday's deadlock and puts him four seconds ahead of Brown and 15 seconds clear of Stuart O'Grady heading into Saturday's penultimate and decisive stage through McLaren Vale and the Fleurieu Peninsula and including two loops up Old Willunga Hill.
"That is the great thing about this race, everyone gets an opportunity if they want it they have to just go and take it; it's in their own hands," said Davis, who finished second overall last year.
"A few of us have got the opportunity to win this race and I am just happy to have been in the jersey over these three days and two wins is unbelievable for the team. We are happy no matter what."
Meanwhile, Lance Armstrong admitted his return to competitive cycling in the race had so far been "disappointing" but he refused to rule out a late victory surge.
The American, competing for the first time in three years, is currently in 38th position overall, 39 seconds behind Davis, and conceded afterwards he was still a little rusty following his long lay-off.
He said: "It's disappointing but still it's January not July so I have to keep reminding myself. It's all about setting and re-setting expectations, it's been three-and-half years, it's a long time. This is still the first race back after a long time and I'd be kidding myself if I expected to show up and pound people."
The race concludes on Sunday on the streets of Adelaide with the Texan insisting he will be there or thereabouts come the finish.
He added: "I think I can be there, although I know I won't be riding away from the field."