Rennes are reportedly planning to swoop under Portsmouth's radar and beat them to Achille Emana's signature.
Pompey have been closing in on the Toulouse midfielder since the end of the season, but talks are still ongoing and nothing has been finalised as yet.
Rennes have made an enquiry to Toulouse regarding the Cameroon international's availability, sparking fresh doubts about where his future lies.
There could be a sting in the tail though for both Rennes and Portsmouth, with Toulouse slapping a large transfer fee on Emana's head.
The 23-year-old is contracted to the club until 2008 and they are unlikely let him go without a fight.