Was watching something and they were showing a defensive map of all the Porto defenders and where they cocentrated during the game when it came to tackles, blocks and challenges. It was literally 75-80% on Saka's side of the pitch. They were laser focused on him the whole game, he couldn't really do too much. I suspect if Martinelli was playing, that migght have been a bit different. Trossard is great, and he scored our goal, but Gabby just offers way more pace and the abililty to run at (and beat) defenders that a team cannot put all their focus on Saka.