Speaking to the club media, Gundogan said: "There was a little bit of thinking behind it. Numbers 21 and 22 were free as well – I was 22 last year at Barcelona and 21 in the German National Team but I didn’t win any trophies with these numbers, so I thought number 19 was between 18 and 20 – my two friends Bernardo Silva and Stefan Ortega so that might be a sign.
"I just went for it – let's see. It’s hopefully not the number that will have a big influence, it’s hopefully the way I am playing and behaving and the way we will be as a team. I can assure you will try our best to win more.”