Dybala is a really special player and he proved it once again. Even though he had an injury and missed many matches recently it still didn't affect him negatively here. He doesn't care about being less fit than the other players. His clinical finish there can bring the Europa League championship to Roma. But as nothing has ended Mourinho wouldn't let his players become complacent even for a second.
He is an adamant manager in this kind of situations. I think in the second half we will watch an a little different Roma. The Mourinho I know would make his players park the bus or play according to a similar strategy. Because as of now they don't need to do anything different than maintaining the current advantage. Sevilla is the side that needs to take bigger risks now.
By the way Rakitic's shot was such an impressive one. It would have been a more impressive goal if the ball didn't come back from the post.