Celtic have rebuffed an approach from new Aston Villa manager Martin O'Neill for midfielder Stilian Petrov.
Petrov wants to play in England
The Bulgarian has made public his desire to leave the Scottish champions and the ex-Celtic boss has been in touch about his former player.
Celtic manager Gordon Strachan said: "I spoke to Martin this week but the conversation is finished and Stan is still our player."
Portsmouth have already had bids for the 27-year-old turned down.
Petrov, who is contracted until 2010 at Celtic Park, wants a move to the Premiership.
Strachan hopes to keep hold of the player who has scored twice in three league games this season.
However, he could not guarantee that Petrov would not be sold on.
"I would like to keep everybody that I have got here," continued Strachan.
"But Bayern Munich look set to sell Owen Hargreaves (who Manchester United are interested in) after saying he is definitely not going and AC Milan also sold Andriy Shevchenko to Chelsea so you never know for certain.
"Everybody has got a price in football but I would rather everybody stayed and we could bring people in.
"We all know if someone says, 'there's £100m for Stan Petrov', and we say, 'he's not for sale', that is silly.
"The dialogue is finished now and things have not changed one iota.
"Stan has showed he is 100% committed in the last couple of weeks on the football field.
"The best thing for a lot of us would be when the transfer window comes everything will be put to bed for a while.
"Hopefully he will play for a long time here and continue to score goals as he has done in the last couple of weeks."