L`OM, who will complete the signing of Dmitry Sychev on Wednesday after he had a medical on Monday, are mounting a serious title challenge.
Finances are tight at the Stade Velodrome, but coach Perrin is always looking at ways of strengthening his squad.
The club were linked with a raid on their southern rivals for Rothen (pictured) and Nonda, but deals are unlikely to be concluded in January.
Perrin said: "Rothen is an interesting player. I don't know the fee, but I don't think we will be able to transfer him.
"For Nonda, we are unlikely to be able to sign him also."
Marseille are working tirelessly behind the scenes to have Sychev available to play a French Cup clash with Bastia on January 4.
The player`s world-wide ban imposed by the Russian Federation is due to expire on that date, but there is no guarantee his papers will be released in time.
Perrin is desperate to incorporate the talented forward into his squad as soon as possible, and the club are trying to ensure his availability.
However, Dinamo Kiev could throw a spanner in the works. Sychev trained with them after leaving Spartak Moscow, and the Ukrainian side are claiming he signed a deal with them.
This would be in breach of Fifa regulations, and the Russian FA insist they would not hesitate in banning him again if it proves to be the case.
"It's against the law to sign contracts with two different clubs and if that turns out to be the case with Sychev, then he will be banned from the game," Russian federation boss Vyacheslav Koloskov told Sport-Express newspaper.
In other news, l`OM officials do not think Nottingham Forest will follow up their interest in midfielder Benjamin Gavanon.
The 22-year-old had a trial at the City Ground before Christmas, but the French club have not since been contacted by Forest boss Paul Hart.
