FC Barcelona stood tall in Saint Petersburg and edged Zenit in Game 3 (70-78) to reclaim the home-court advantage.
After a hard-fought battle in the first half (33-34), the Catalans took over and never looked back.
Playing very well on both ends, they led by as many as 10 (42-52) and endured the comeback of the Russians (58-59) the seal the deal.
FC Barcelona now leads the series (2-1) and has moved one win away from the EuroLeague Final Four.
Game 4 of the series will take place on Friday. If Zenit wins, they will force a Game 5 next week. Otherwise, FC Barcelona will close out the series and will advance to the Final Four.