Buy one, its like €20 and then you can purchase tixs through that when they come on sale. I've never bought an away tix without the card.
Not yet, I would still snag the card tho CHELSEA-ROMA Data: 18.10.2017 Torneo: Serie A Luogo: Stamford Bridge Ore: 20:45 (Italy) Biglietti: Ancora non in vendita.