Former Chelsea forward Salomon Kalou scored twice as Lille came from behind to beat mid-table Bastia and stay in touch with the Ligue 1 pacesetters.
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Midfielder Ludovic Genest shocked the hosts with a third-minute opener, before Kalou came to the fore.
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The Ivory Coast international showed quick feet to find space and slot home the equaliser, then curled in a sublime finish from the edge of the box.
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The result saw Lille move four points behind leaders Paris St-Germain.
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The 2010-11 champions boast the most miserly defence in the French top flight with Genest's goal only the sixth they have conceded, and the first at the Stade Pierre-Mauroy since October.
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Their Kalou-inspired recovery saw them tighten their grip on third spot, while Bastia, whom Chelsea midfielder Michael Essien counts among his former clubs, remain 13th.
The africans in that french club have been doing very well. Good one from Kalou and Enyeama