CL semifinal could use some help

First of all i would like to say hi to everyone on this forum since im new here and dont know much about i would really appreciate any help i can get.
Currently im in the semifinals of Champions League and i have a hard match tonight at 21.52 against an opponent that has like average starting team around 43.7, altough he eliminated in the previous match the favourite team that had like most of the players bought from impresary with special abilities.
He is playing 4-1-2-1-2 Narrow Diamond tactic and i considered to start with a really defensive tactic
Here is the picture http://i44.tinypic.com/23it92u.jpg
I'v been reading counter formations and stuff like that here but he's last opponent did the same and lost in a terrible manner so i wouldnt want that to happen to me.
Thanks cheers :cool: