As far as I'm aware there isn't an official link between BlackBerry and Arsenal Football Club, so I'm presuming that Mesut must have chosen the Passport himself. He may well have been drawn to it due to the BlackBerry flagship being available in the same red that Arsenal play in!
As you can see in the images below, the german footballer isn't tweeting because of his Passport, but instead to show off the beautiful Singapore skyline. I think the red Passport looks far more impressive!
Have you spotted any sports stars or other famous people rocking a BlackBerry 10 device lately? If so, stop by the CrackBerry Forums where we have a 'BerrySpotting' thread.