Celtic assistant boss John Collins insists he has no problem with captain Scott Brown.
Collins managed Brown at Hibs when the midfielder was part of an Easter Road squad which raised concerns over his training methods.
However, 46-year-old Collins said he was looking forward to working again with the Scotland international.
"I had a terrific relationship with Scott on the training pitch and never had one problem with him," he said.
Brown was among the Easter Road players in 2007 that complained about Collins's methods to chairman Rod Petrie before the midfielder moved on to Celtic in a £4.4m move.
"I worked with Scott at Hibs on the training pitch and he was a fantastic professional and an excellent player," Collins said as he begins work in Ronny Deila's backroom staff.
"Gordon Strachan asked me at the time about Scott coming to Celtic and I told Gordon he would be a wonderful signing for Celtic. I was proved right.
"He has been the captain, playing terrifically well, and an international.
"I'm looking forward to seeing Scott next week and working with him. I had a terrific relationship with Scott on the training pitch and never had one problem with him ever.
"Why? Because he's a good professional who loves training and likes performing well.
"And he did perform very well for me at Hibs, week in, week out, and that's one of the reasons he got his big move to Celtic."
Collins made 229 appearances for Celtic from 1990 to 1996 and the 58-time capped Scotland midfielder also featured for Monaco, Everton, Fulham and Hibernian during his playing career.
Celtic begin their next campaign on 15/16 July with a Champions League qualifier against an as yet unconfirmed round-two opponent.