ST. PETERSBURG, Nov. 26 (Xinhua) -- A late own goal from Atletico Madrid defender Toby Alderweireld has ended Atletico Madrid's run of four consecutive wins in Group G of the UEFA Champions' League as the Spanish side drew 1-1 with Zenit St. Petersburg on a cold night in Russia's northern capital.

After a goalless first half, an Adrian Lopez strike in the 54th minute appeared to have ensured another three points for the unbeaten Spanish club until a combination of Alderweireld's carelessness and a misjudgment from goalkeeper Thibaut Courtois allowed Zenit to equalize with a quarter of an hour to go.

Atletico, who were guaranteed to finish top of Group G before tonight's match, will face Porto in their final group match, while second-placed Zenit will face Austria Vienna in a do-or-die away clash as the three remaining teams in Group G battle for the second qualifying spot.