Jonathan David scored his 12th goal of the season, setting the mark for most goals by a Canadian in a top-5 men's European soccer league, as French league leader Lille won at Lens 3-0 to move four points ahead of Paris Saint-Germain on Friday.
Burak Yilmaz scored an early penalty and added a superb long strike in the Lille victory.
PSG must beat Rennes on Sunday to stay within one point of Lille. But even if defending champion PSG wins at Rennes, which is chasing fifth place and a Europa League spot, Lille can seal a first title in 10 years by winning the last two games.
Yilmaz took his total to 15 league goals since joining from Istanbul side Besiktas last summer.
He struck with a penalty in the fourth minute and spun outside the penalty area to clip a brilliant dipping shot into the top corner in the 40th, moments after Lens midfielder Clement Michelin was sent off for a second yellow card.
Lens dropped to sixth place to trail fifth-placed Marseille on goal difference, and is only two points ahead of seventh-placed Rennes, having played one game more than both sides.
Marseille is at Saint-Etienne on Sunday.
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