Board Game Arena

I had agreed in the chat of a game about a rematch, but either I pressed the wrong button or the rematch didn't work. I wanted to write to the user to apologise, but I couldn't find a way to tell who I had played against in the last game since I didn't notice the username.
Is there a way to find that info?

Go to your profile, click the "X games played"-header and you see a list of your past games.

(If you wanna know something that is further in the past, you can click the games history link in the upper right there to get more filters)