The BMC rider finished on his own at the top of a steep climb near Roncone making his overall lead 45 seconds going into tomorrow's final stage.
Domenico Pozzovivo pushed Evans most of the way put was dropped with one kilometre to go leaving the Australian to power home yet another stage win.
Evans looks in good shape as he prepares for the Giro d'Italia, the event which he will focus on this year rather than the Tour de France. The veteran cyclist seemed happy with his performance but admits it isn't over yet.
The 37 year old said, according to Cycling News: "It wasn't very enjoyable but it's good to win.
"Tomorrow's stage is even harder. Things can change but I'm really happy for the way things are, how the team rode and how things are looking for the Giro d'Italia."
Evans is one of the oldest cyclists throughout all the professional teams at the moment but he believes he has gained experience through age and he still has the same passion and motivation as he did when he was just starting out in the world of cycling.
The Australian said: "I find the motivation by people saying I'm a year older," he joked. "But age is just a number that I'm sometimes judged on. But I think people can see that I'm still motivated to race.
"I've still got the same love for the sport, the same desire to do well and the same passion as when I was 25. Now perhaps my experience helps me. There's nothing I can do about my age, it goes up for everyone. I just don't think about it, even if I won't be racing at a high level when I'm 40."
The 2011 Tour de France winner will not feature in the Tour this year and will concentrate all his efforts on the Giro d'Italia where he will be one of the favourites to win the race. Tejay Van Garderen will lead BMC in France instead.
Evans was initially sad about not racing in the Tour de France but he's happy to be taking part in the Giro.
Evans said: "I'm happy to give it everything for the Giro d'Italia for now. I might be sad when I have to watch the Tour on television but for ten years my whole life rotated around the Tour de France.
"But to win the Tour, you need the support of everyone: yourself, the team, the sponsors and everyone behind you. If you don't have that, it's almost a waste of time doing it.
"The team decided that I wasn't doing the Tour and that I should focus on the Giro. I didn't have a lot of choice but I accepted it and realised that it was a weight off my shoulders. Ten years is a long time and fortunately I managed to win one Tour, so I have to be satisfied with that."
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