Lyon coach Remi Garde admits he is concerned about his side's form after three defeats in their opening seven matches.
The midweek loss against lowly Ajaccio followed reverses against Evian and Stade de Reims, both sides below them in Ligue 1.
It means Saturday's visit of Lille takes on additional significance.
``It is now three defeats and it's a lot,'' said Garde, whose team are seven points behind leaders Monaco already.
``Is this worrying? Yes when you look against who we lost to, no disrespect to those teams.
``There is still work to be done at this level. I hope the players realise.
``If we win (against Lille) we can catch up. This is an important game. We have our backs to the wall because the league is important.
``The squad is young and they need to actually see the work in training paying off.''
Midfielder Guida Fofana believes they will only start to turn things around when they stop conceding as frequently as they have been doing.
``We need more defensive solidity. A good offence requires a good defence,'' he said.
``After a defeat we need the heart to bounce back.
``We need the three points and we will do everything possible to win against Lille, who are fourth having made a good start to the season.
``Big games are good for us. There is still more motivation.''
Lille coach Rene Girard has tried to play down their good start to the season.
``Thirteen points is interesting. Our ranking is good but does not deserve attention,'' he said.
``There are still a lot of points to play for and this weekend it's Lyon, an important fixture against a team that, like us, is in the second group of the championship after PSG and Monaco.
``Being competitive means having a say in the championship. Our scope for growth is real, but there is still work to do.''