Guingamp's Claudio Beauvue has been linked with a move to Everton and West Ham United.
The Newcastle United boss said Gabriel Obertan was a player that took his chance, but insists Marveaux also had an opportunity.
Sylvain Marveaux has bagged two goals for Guingamp in the Europa League.
Players from Southampton, Guingamp, Preston North End, AC Milan and Borussia Monchengladbach all feature, including an ex-Manchester City man.
Guingamp's Gianelli Imbula has been catching the eye of Europe's biggest sides with his impressive displays in Ligue 2, and Chelsea might try and finalise a £6 million deal for the 20 year old this month.