Arsenal's finances are reportedly set to receive a welcome boost before of the January transfer window, with former youngster Jeff Reine-Adelaide linked with a move to Lyon from Angers.
Gunners' funds could be set for another increase, with reports in France claiming that former midfielder Reine-Adelaide is on the verge of a £18.5m (€20m) move to Lyon.
If the 21-year-old does complete the transfer from fellow Ligue 1 side Angers, Ouest France reports that Emery's side will receive 10% of the fee as part of a sell-on clause agreed when the player was sold a year ago.
After managing just eight senior appearances at the Emirates, the Frenchman impressed for the Ligue 1 side last term, scoring three goals and three assists in 36 appearances.
He recently faced his former side in a pre-season match and started the new league campaign with a goal against Bordeaux on Saturday.
The Premier League club have reportedly already benefitted from another former player after Ismael Bennacer completed a move to AC Milan.
The Algerian, 21, joined the Serie A giants in a £14.4m move from Empoli, with several reports claiming that the deal resulted in his former club receiving a chunk of that sum due to a 30% sell-on clause.