Robbie Keane hailed Scott Brown as a 'lad' as he wished his former teammate a happy retirement.
Brown left Celtic in 2021 after over 400 appearances with the club and has spent a season with Aberdeen but will now hang up the boots.
Keane played alongside Brown in 2010 when he went on loan to Celtic and shared a classy retirement message to his friend.
Posting on Instagram, he said: "Happy retirement pal. What a player and more importantly a lad."
Speaking to the Daily Record about his decision to retire, he said: “It’s been a very difficult decision to call time on my playing career but I’ll be 37 next month and I feel the time is right for me to announce that I’m retiring in order to focus fully on becoming a manager.
“It’s the end of one chapter but the start of a new one and I’m excited about what the future might hold.
“Obviously I will cherish some amazing moments from my time and none better than winning so many trophies during my years at Celtic. So I’m delighted that the club is now about to celebrate winning the title back.
“I know how it feels to lift that trophy and how much hard work is required to win it.
“So I have to take my hat off to Ange Postecoglou for the job he has done in such a short space of time.
“I hope the manager and the players savour every moment.
“It was always an honour for me going out there as captain, knowing the lads were listening to you in that huddle, with 50,000 fans behind us wanting us to do our best.
“Yes my last season didn’t go that well but that’s football. You’d take nine out of 10 titles all day long!"
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