The German winger and Argentinian defender were given a rare opportunity...the chance to design some caps that will become available for fans to buy.
Otamendi, a regular user of baseball caps, said: "I'm happy because it's something different to what we normally do which is just playing football on the football pitch. I really hope the fans can get themselves a cap, just like this one, and get some use out of it! I hope they like it!"
Check out what they get up to while creating the caps in the video above. You can also expect to see the caps in the CityStore this summer.