Braga have been the surprise package in Europe this campaign and beat fellow Portuguese rivals Benfica in the semi-finals on the away goals’ rule.
On the other hand, Porto have been arguably the best team in the Europa League and comfortably got past the challenge of Villarreal in the last round, winning the tie 7-4 on aggregate.
Paciencia, who played for Porto between 1987 and 1997, knows the tough task his team face and told Uefa.com: "Porto have always had a very strong team, and right now Porto are a team that could do well in the Champions League.
"They are a club of the Champions League. In a final, and given how the season has gone, it's natural that Porto are big favourites.”
However, he added: “But it's a final, it's just one match. With the right inspiration and motivation, many situations can occur in a match that can get you a goal. That is what makes us believe it's possible to win."
This is Braga’s first appearance in the final of a European club competition. They won the Portuguese Cup in 1966.