Riordan has yet to score for Celtic

The 23-year-old has made just four appearances for the Scottish champions since moving from Hibs in the summer.

Grant told the Daily Record: "I like him and I'd definitely be interested if Celtic said he was available.

"I haven't made official contact with Gordon Strachan but I really liked Derek at Hibs and came up to watch him a few times at Easter Road."

Riordan was top scorer for the last three seasons at Hibs but has found it difficult to break into Strachan's side at Celtic Park.

"The Hibs team shapes up the way I like Norwich to play and Riordan would fit in the way he did at Easter Road," added Grant.

"I don't believe that Derek's become a bad player overnight because he can't get a game at Celtic Park. There are reasons to explain that away.

"If a manager has a team who are 15 points in front it might be that the player ahead of Derek in the queue for a game can't be left out.

"It doesn't mean Riordan's not worthy of a place in the side. It means the man who's already in the team's doing his job properly.

"Derek has great qualities and I'd have to be stupid not to be interested if Celtic wanted to enter into any kind of deal."