The advantage Roma captured by a 1-0 win is important of course. However I still don't see this score much safe for them at the same time. Because we are talking about another dedicated team like Leverkusen under Xabi Alonso's management. I believe in them fully about not giving up until the final whistle in the second leg. They have shown this dedication example so far in the tournament many times you know. The first leg wasn't a one-sided match either. Leverkusen were just not having a good day to make use of the chances.
At least roma is leading in the aggregate. Mourinho can also try to analyze the previous match to determine the best strategy for the second leg. Xabi was using modern strategy which was focusing in the ball possessions.
The best strategy to counter this by implementing parking buss strategy to make its players become frustated and roma can make chance to do counter attack against leverkusen.
It seems like that roma is a bit superior this time compared with leverkusen. I prefer to pick roma.
But in Germany we could see a very interesting scenario. Leverkusen seem to be focused on the Europa League more now so I expect them to be well-prepared for Roma. I think Roma will try to play more defensive this time especially while Mourinho is managing the team. Leverkusen had better play more efficient this time.
Playing fully offensive against leverkusen away will be a very bad decision for as roma. Levekusen will be trying so hard to cretes so many attack against as roma. Mourinho must be thinking which the best strategy for roma. The only best choice to implement defensive - counter attack strategy.
Roma can wait for the leverkusen to have sloppy performance or blunder during the game. It will able to give roma ability to counter it.
I prefer to see roma to play fully defensive to win the game. Draw or win is good for roma but leverkusen must be winning by making more than 1 goals with clean sheet against roma.