West Brom midfielder Nacer Chadli is a wanted by Lyon.
The Belgium international is interesting OL as a potential replacement for Nabil Fekir.
While he's tied to the Baggies until 2020, Chadli can leave after the World Cup due to their relegation.
The midfielder has been linked with Southampton since the end of last season, but could be on the move to France instead.
OL president Jean Michel Aulas hinted: "We're following two players closely.
"We could observe them (at the World Cup)."