Yoann Gourcuff has said he is "disappointed and frustrated" with his performances since joining Olympique Lyon from Girondins Bordeaux in August.
"I expected a lot more of myself," the France playmaker, whose third-placed side host his former club on Sunday, told Friday's Sud-Ouest newspaper.
"It's clear that my attacking contribution is not enough."
Injury-hit Rennes, the early season pacesetters, are still smarting from Tuesday's French Cup last 16 defeat to second division Stade de Reims which prompted coach Frederic Antonetti to slam his players as not good enough.
"We are not showing the continuity we are capable of. This explains our situation," he told reporters. "It's in the head, because it's the head that control the legs."
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