Dinos Mavropanos completed his transfer from VfB Stuttgart to West Ham United on Tuesday, and we were there to track his first day as a Hammer.
Our new No15 was at London Stadium to sign his contract, complete his media work and try on the Claret and Blue shirt for the very first time.
The West Ham TV cameras captured it all and now you can go behind the scenes of the centre-back's first moments with the Hammers in the video above!
