Neil Lennon admits it was an emotional day at Celtic on Sunday as Kieran Tierney said goodbye to the squad.
The new Arsenal left back was back in Glasgow sorting out his stuff after completing a switch to North London.
He popped in to see the rest of the squad and Lennon admits it is tough for the players to lose someone so important in the dressing room.
But the Celtic boss insists the players will move on now and there's an opportunity for a new academy player to come in and take over Tierney's role.
He said: "He was in yesterday. He popped in and everyone was delighted to see him. He had a really nice farewell from the players and it was emotional for him obviously but the players get on with it now. That's what you do, you move on.
"He's a big miss obviously but there's an opportunity there for someone else to take on the mantle."
Lennon also insists there's no chance that James Forrest will leave the club this summer despite being linked with a move to Zenit St Petersburg.
Having already lost Tierney to Arsenal, Lennon insists no more big players will be allowed to leave Glasgow in this window.
He added: "He is another one that we don't want to go. A big player, a big goalscorer. He has been here a long, long time. He is under contract.
"There is no confirmation of that (Zenit interest), it is just speculation, but it doesn't surprise me. However, from my point of view we want James here and he is happy here as well.
"It's important to hold on to your better players, we have already sold one so we don't want to sell any more. We are looking to add to the squad rather than selling any more of our important players and James certainly falls into that category."
