Well a player can't get a rating over 10, so it's some kind of a visual glitch.
Make sure to write about this to our support team so they can examine the match.
You can contact support by starting the app, tapping the Home button at the top left and then the "?" button down next to settings.
Btw, what does the after-match report show about A.Gregory's rating? Can provide a screenshot?
This gets posted on FB from time to time. But it's only ever the in game rating, not the post report