Smalling has grown accustomed to Manchester United buying big-money replacements at centre-half.
And he said: “I think it takes big characters to last so long at United. They're always being linked to every player who has played the game but the manager has faith in me and now I just want to finish the season as strongly as I can and enjoy it.
“We've got five or six centre-backs so it's all about making sure you're the one who is playing and making sure you can do your job. I'm happy playing with whoever I play alongside.
“At the minute I'm playing every game and performing in big games so I'll just keep on doing my job."