Thomas Gravesen's Celtic's career is again under scrutiny after critical comments from manager Gordon Strachan at the club's Swiss training camp.
Gravesen (left) had a disappointing debut season for Celtic
"I won't work with him any more than I'll work with any of my players," said Strachan on the Hoops £2.2m signing.
"It's quite simple - Marcello Lippi always said if you tell a player four times where to be and what to do and they don't get it, then forget it.
"He got the same time as everyone else last year and it'll be the same again."
Gravesen was the Glasgow side's most high-profile signing of 2006/07, but he failed to make the expected impact during Celtic's Double winning season.
You have to enhance your talent at Celtic because there are lots of talented people and the hungrier ones will be successful
The Dane was dropped from the Scottish Cup final squad and recently rejected the opportunity to move to Sheffield United.
And Strachan - who watched his team slump to a 4-1 friendly defeat to Young Boys of Berne - added: "You have to enhance your talent at Celtic because there are lots of talented people and the hungrier ones will be the ones who are successful."
Meanwhile, Derek Riordan accepts that he may have to consider his Celts future if he does not force his way into regular first-team action in the forthcoming season.
The former Hibernian striker netted seven times in 21 appearances last term but knows he faces stiff competition for a place up front with Jan Vennegoor of Hesselink, Kenny Miller, Chris Killen, Aiden McGeady and Scott McDonald.
"I don't think I would have another season like last season," said the 24-year-old.
"I don't have a deadline in my head, but at the start of the season I want to see how the games are going and where I am in the manager's plans.
"Last season wasn't how I'd hoped - I wanted to play more games.
"I knew it would be hard to get a game when I came here," he added.
"But obviously I thought I would play more often. I expected that."
Celtic continue their pre-season preparations with games against Peterborough United and Queens Park Rangers on 13 and 15 July respectively.