I am german when we win an immigrant when we lose mesut ozil as he quits national team

I think I understand what you're saying!

In Germany, when the national team wins, it's common for fans to celebrate by saying "Wir gewinnen, wir holen ein Ausländer!" which roughly translates to "We win, we get an immigrant!" This is a playful way of saying that when Germany wins, they get to "import" a new player from another country.

However, when the team loses, it's often joked that they "lose" a player, and in this case, it's often Mesut Özil, a German player of Turkish descent who has been a key player for the national team. So, in this context, "Wir verlieren, wir verlieren Mesut Özil!" means "We lose, we lose Mesut Özil!"

It's all in good humor, of course, and not meant to be taken seriously.