damn it, the power went off, just deleted all I wrote...

anyways, you don't need to worry. Your midfield is stronger and you will have even more possession in the home return leg. I would play 4 at the back instead of 3 DC because it gives you more security when pushing up with your wingers. Don't play DL DC DR! 3 DC is always better since its easier defending a cross 3/2 DC vs 1 ST rather than battling man to man (your fullback defend against his winger, your DC marks his ST). He will certainly change his formation in the 2nd leg as he needs to chase a goal atleast. He might play 2 ST or add an AMC to exploit your hole and pull your central defenders out to create space for his ST. You might want to play with a DMC as I can see he puts red arrow on Schurrle to fully utilizes his dribbling ability. 4-1-4-1 same as his with short passing, mixed, defending, own half, normal tackling, zonal, no offside trap, no counter should give you the berth to the next round. In the last 15 minutes change to hard defending, hard tackling, flanks passing to see off the game. Push the ball to the sides will prevent danger incase you mistakenly lose the ball. If you want more safety play 4-2-3-1 with 2 DMC and ML, MC, MR long passing, through middle, zonal, no offside, yes counter. You can even surprise him by attacking him hard the 25 minutes...all depends on the players you have and how your opponent will predictably play. You may want to look at his roster and predict what he might bring to the table with the players he possesses and be ready for it. I hope your players are all versatile giving you the option of playing 2,3 different formations with your starting 11. Making yourself unpredictable will give you better chance of winning matches. I think you got it all but confidence and I believe you will add to your trophy room the CL trophy soon. Keep me updated!!!

You have a very nice and balanced squad! He has a freekick specialist but you got 2 wall defenders so you safe. Look for 2 DC with heading abilities to battle in the air and your defence should be solid. Oh...and correct me if i'm wrong, but put blue arrows on Gonzalez to halt Schurrle's advancement if the guy is having fun runs at your defence during the game. Gonzalez is the guy marking Schurrle right?