Lyon have agreed a deal in principle to sign attacking midfielder Jeff Reine-Adelaide from Ligue 1 rivals Angers.
The 21-year-old will undergo a medical before finalising a move reportedly worth around €30million.
Arsenal, Reine-Adelaide's former club, have the opportunity to hijack the deal by submitting an equivalent bid.
The Gunners inserted the clause as part of the France Under-21 international's departure in 2018 but are not expected to match Lyon's offer.
Reine-Adelaide made 35 top-flight appearances last season, scoring three times, and could make his Les Gones debut against Angers on Friday.
Elsewhere in France, Montpellier have acquired goalkeeper Geronimo Rulli on a season-long loan from Real Sociedad.
The deal includes an option for Montpellier to sign the Argentinian on a permanent basis.