The striker, who is the top scorer in the Portuguese league this season, directed home a perfectly-placed header in the 78th minute to enable the hosts to leapfrog the Mediterranean club in the standings by a point.
Porto, who took the lead through Tarik Sektioui in the first half, just about merited the victory, although they were pushed all the way by an OM side who belied their lowly status in France´s Ligue 1 with a solid display here.
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