Gary Megson believes it will be ' a nightmare' for Bolton if Nicolas Anelka plays for France in their Euro 2008 qualifier against Ukraine next week.
Bolton's seven-goal striker will report for international duty despite missing the last four games with a hamstring injury, including the 0-0 draw against Middlesbrough yesterday.
Anelka is not due to return until early December after being told he would be out for six weeks - missing successive Barclays Premier League matches against Manchester United and Liverpool.
Anelka suffered the setback in Megson's first game in charge against Aston Villa on October 28.
The Bolton manager is hoping France coach Raymond Domenech will return the player to his club after he has been assessed by their medical team.
'Nicolas has to go, we know that, so they can see what state he is in,' said Megson.
'He has this tear on his hamstring and the prognosis was six weeks on the sidelines.
'It would be a huge mistake if they said he had to stay then train and play. It would be a nightmare for Nick and for us.'
France currently top Group B and will qualify for the finals without kicking a ball if Italy triumph against Scotland on Saturday.
If that does not happen, a point in Kiev next Wednesday will send them to Austria and Switzerland.
France also have a warm-up match on Friday when they entertain Morocco.
Megson added: 'We have spoken to Nick and told him what we think. He accepts that. However he still has to report to the squad.'
Anelka looked on from the stand against Middlesbrough on Sunday, as Bolton remain in the relegation zone with only one win in 13 league games.
Megson said: 'We are glad some of our players will have a breather during the international break.
'Maybe during this time we will also be able to get some of our injured lads back.
'Given the position we are in we need to start winning games, especially at home.'