Decisive..

Calls

There was high percentage of correct decisions throughout the game. He correctly ignored some foul appeals, and gave the necessary ones. There was a good advantage play before second goal of Besiktas. Both yellows of Barbosa were remarkable. He intentionally let himself down which obviously required a YC. But, referee's overall YC-foul pairs were wrongly matched

Very good positioning

What I found with Blom great was his positioning in the game. He was just very close to positions, not blocking the routes of attacks which I believe was a result of high concentration to game