Lyon president Jean-Michel Aulas has confirmed the club have rejected a €45 million (£40m/$51m) bid for Tanguy Ndombele from Tottenham.
The Champions League runners-up are the favourites to land the 22-year-old midfielder but they have fallen short of Lyon's asking price.
The French club have already seen Ferland Mendy leave to join Real Madrid for €48 million (£42.7m/$54m) this summer and Aulas insists they do not need to sell any more players because they are financially secure.
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And the president has urged Tottenham to increase their initial offer for the France international if they want to land him in the current transfer window, suggesting they will have to offer close to €80 million (£72m/$101m) to convince Lyon to sell.