Football weekend
 

Hello everyone
I'm seeking advice
Me and a friend are planning to see 3 football games in three different countries in one weekend.
We wanna see
Arsenal vs Swansea
Ath Bilbao vs deportivo
And an Italian game.

We don't know which is the easiest, cheapest and most secure way to collect the game tickets???
Has anyone any experience with this?

Thank you
Niklas