Kieran Tierney insists he's happy at Celtic.

The left-back has been linked with Manchester United this season.

"If somebody wants to buy you then that means you are doing something right," said Tierney. "When big teams are looking at you, it's flattering.

"It's happened during most windows since I broke through. It's good for me.

"It doesn't bother me or distract me because I'm enjoying myself. I'm playing for Celtic, so I'm happy. I'm not in any rush at all. I had four years left on my last contract and, if I wanted to leave, I would have chosen to run that down. Instead, when the club offered me six I was happy to sign."