The French giants looked set to maintain their 100% record in this season´s competition when Mamadou Niang met Djibril Cisse´s 69th-minute cross and poked in the opener against the run of play.
But Porto, having dominated the clash and twice seen drives rebound off the woodwork, salvaged the draw they were entitled to when Lucho Gonzalez scored a penalty 13 minutes from the final whistle.
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