Tottenham have had a £60m attempt to trigger Gibbs-White's buyout clause challenged by Forest, which have reported their approach to the Premier League.
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Forest insist Spurs' attempt to match the midfielder's clause included an illegal approach to the player.
The Daily Mail says while disappointed, Gibbs-White has impressed Forest staff with his commitment in preseason training this week.
The England international has requested clarification from all parties about where he will be playing next season and would like his future settled before the Forest squad travels to Portugal for a training camp this weekend.
It's suggested Forest may soften their stance if Spurs return with a higher offer of £65m for the player.