Bayern Munich have had a bid for teenage full-back Sebastien Corchia turned down by Le Mans.
Le Mans chairman Henri Legarda confirmed the German giants made a €2.5 million offer for the 19-year-old defender.
The French outfit, who were relegated to Ligue 2 last season, are holding out for nearer €5m but a deal could yet be done.
"It didn't match what we expected, but talks are going on," Legarda told L'Equipe.
Le Mans forward Madibo Maiga is also set to leave the club this summer and although the 23-year-old Mali international looked set to join Sochaux, there has been interest from some English clubs, who could hijack the deal.
Bayern, meanwhile, look set to loan midfielder Jose Sosa to Spanish club Espanyol.
The Argentinian spent last season back in his homeland on loan at first club Estudiantes, who are keen to agree a new deal for the 25-year-old.
But Bayern now want Sosa, who has so far made just 35 Bundesliga appearances since joining Bayern in the summer of 2007, to gain more experience in one of Europe's top leagues.
"I have said to the officials at Estudiantes not to make plans including Sosa in the team for the second part of their season because Bayern want the player stay in Europe," his agent, Favio Bilardo, told La Redonda radio station.
"I know that Estudiantes are going to wait until the last minute to see if they can have the player for the rest of the year, but they should have a plan B just in case Bayern doesn't accept a new proposal."