Cristiano Ronaldo's header gave the Seleccao the vital goal in their 1-0 quarter-final win against Czech Republic, and they now face the possibility of playing Spain or France in their semi-final.
Portugal, who began the tournament badly with a 1-0 defeat to fellow semi-finalists Germany, have now won three consecutive games including the 2-1 defeat of Holland.
|11/2||Portugal are 11/2 with Paddy Power to win Euro 2012.|
And Villas-Boas feels that Portugal's boss Paulo Bento is doing a great job.
"There has been an evolution after every match. Portugal have the right coach," Villas-Boas told reporters.
"Yesterday, we took another decisive step and we have every chance to win the tournament."
Villas-Boas, meanwhile, has been heavily linked with the vacant managerial position at Tottenham after Harry Redknapp was sacked by chairman Daniel Levy.