Neymar has been heavily linked with a return to the Camp Nou, with the LaLiga champions apparently ready to offer players and cash in exchange for the Brazilian.
If a deal is eventually completed for the 27-year-old, Barca will have no shortage of attackers, with Lionel Messi, Luis Suarez and Antoine Griezmann already at the club.
But Sissoko, speaking to RMC Sport, says competition is normal at any big club.
“He doesn’t feel at all threatened. When you play at Barca, you expect to be in competition there.
“Neymar or another, he does not care about that, he only cares about what he has to do,” he said.