The 23-year-old, who can also play in defence, is a confirmed Rangers target but a stumbling block to the deal is Bordeaux´s valuation of the France international - they have started negotiations at £10million, and Rangers will only pay a fraction of that price.
His agent, Philippe Sol, said: "He made it clear his only intention is to leave, and he wants Bordeaux to do a deal with Rangers. Bordeaux are refusing to do that at the moment so Julien has taken the decision not to train to make his feelings clear."
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