George McCartney says Lorik Cana has made a big impact at Sunderland.
Northern Ireland defender McCartney is looking forward to going head-to-head at international level with his Sunderland team-mate Cana.
"He plays midfield for us and centre-half for Albania, " said McCartney. "He is a top bloke, a really nice guy, who is easy to get on with.
"He joined in the summer and gets on really well with the lads. It is good to have him around the place."