The Brazilian International helped his team to a 1-0 win over the Portuguese Champions in their last meeting and he has insisted that he will be doing all he can to make sure they claim three points at the Petrovsky Stadium.
"I was very pleased to return to the Dragão Stadium, the audience warmly received me. I was not able to score, but tomorrow I'll do anything for it," UEFA.com quotes him as saying.
"Of course, at Porto I really grew as a player, learned a lot, won titles, but tomorrow will be a crucial game for our team, it will be very special for Zenit.
"Any player celebrating a goal thanks the team-mates who made it happen. If I score a goal against Porto, I will celebrate, but with a little bit of sadness inside."
Porto are currently second in their Champions League group with four points.