I wasn't certain about him because he is so small and I usually like my wingbacks to be strong and good in the air, But Alba makes up for it in pace interceptions and stamina. Sure he won't win all the headers like Filipe luis or Hernandez, but he loves his wings and runs up and down them all game. He has decent jumping, so he does win some headers.
If u don't have the coins, just get his normal card. it really isn't that much worse.
Not very phyiscal