CRAIG GORDON today insisted he owes his successful season to Celtic boss Ronny Deila.

Gordon returned to the international fold this term after becoming the first-choice keeper for the Parkhead side - despite arriving at the club after a two-year absence from competitive football because of injury.

And he believes that not only has Deila been pivotal to his impressive campaign - but has made him a better keeper.

"The manager has been brilliant for me," said Gordon. "Ever since that first game of the season when he handed me the gloves for the match against St Johnstone he has been incredibly supportive. There is no doubt in my mind that I owe him a lot. He has been superb for me.

"He has changed the way the team played and he stressed how much he wanted the team to play from the back. I had never done that at any previous club I had been at and that was a new challenge.

"I have worked hard on that aspect of my game and he always seemed to have a confidence in me that I would be able to adapt to that. Being backed like that by a manager is a good feeling, and it definitely makes you go out on to the pitch and want to play for him and for the team.

"He has had a great first season. There was a lot going on in the summer. He had to try and make his formation work on the pitch and it was a lot of hard work for him getting his message across of exactly what he wanted from everyone.

"I am delighted to see him get his rewards by winning the Premiership and the League Cup."

Meanwhile, Deila has insisted there is no-one for sale this summer at Celtic Park.

Stefan Johansen, Nir Bitton, Charlie Mulgrew and Virgil van Dijk have all attracted attention this week - but Deila is adamant his priority is in keeping all his players at the club as Celtic chase a place in the group stages of the Champions League.

"Keeping all the players is the most important thing for me," said Deila. "If we lose one player or two every season it's not the worst thing, but if we lose a lot of players it's much worse," he said.

"We don't need to sell them, we don't want to sell them. So we're going to keep them here. We want to go into the Champions League.

"I hope the message is quite clear: we want to keep our team and add people who can make the team better. We want to be as strong as possible to get into the Champions League. That's where the big moments and the money are."