Italy and Croatia are to meet this night and the outcome of the game will determine which one of them would face Germany in the round of 16.
No.
Germany will face the second placed team of group C. The match between Italy and Croatia is from Group B and has nothing to do with determining the oponent of Germany in the Round of 16.
The runners-up of group B will face Switzerland and third placed team (if qualified) will face winner of group E or winner of group F (Portugal).