Benfica coach Jorge Jesus will draw inspiration from Celtic's win over Barcelona earlier this month when he takes his side to Camp Nou next month.
The Portuguese outfit are now level on points with the Hoops in UEFA Champions League Group G after their 2-1 win over the Scottish champions at the Stadium of Light and they have the better head-to-head record.
However, Celtic appear to have the easier final game at home to Spartak Moscow when they will need to better Benfica's result in Spain.
Jesus said: "It was a great win for us. We didn't deserve to be drawing at half-time, they scored with a set-piece as we thought they might. But we played very well.
"Now we are playing on the biggest stage in the world against the biggest team in the world.
"But we have shown we are more of a team than Celtic and they beat Barcelona so nothing is impossible. If we have a bit of luck we can do it."