Sporting CP coach Ruben Amorim insists everything is open after their 2-2 Europa League draw at Arsenal.
Amorim is upbeat ahead of the round 16 second-leg in London.
He said, "The tie is open, it's difficult obviously. Arsenal are a team that pushes others to the front of their area, we have to be able to defend. I would be more open with a 2-1 or 3-1, as we had the opportunity to do, but, after today, we believe more that it is possible.
"If something like this were to happen, it's the epitome of our times [Paulinho's miss]. Sometimes things are about to happen and something takes us back a little.
"We have to keep working and our luck will change."