The Spanish giants Barcelona, have marked the Austrian left back David Alaba ,who is now playing his club football in Germany with the German giants Bayern Munich. according to the DAILY MIRROR, Barcelona want to sign him up in the summer transfer window. The reason that Barcelona want to sign him up is as he is a very good player, and can play in several positions which will always be a plus point to have as a footballer. He can play as a midfielder a central defender and of course his favoured position is a left back position .