Lyon have rejected an offer of 35m euros (£29.3m) from Arsenal for France forward Alexandre Lacazette.
The 25-year-old scored 21 goals in 34 league appearances last season, and is under contract at Lyon until 2019.
In a statement on Twitter, the French club said "Lacazette is irreplaceable and one of the main leaders" in coach Bruno Genesio's team.
Lyon denied a newspaper report saying they turned down an offer of 48m euros (£42.2m) from the Premier League side.
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