McCartney determined to play his way to new West Ham deal
The defender is off contract in June.
"Obviously I prefer playing at left back but there were a couple of times that I played games at centre-half," he said.
"If needs be and the manager has a few injuries then I can do a job there. Hopefully I can fight my way back in.
"It's going to be tough but we'll see what happens."
For breaking stories and all the great banter like us on Facebook: facebook.com/tribalfootball