Brazilian striker Hulk, who joined Russian champions Zenit St Petersburg earlier this month in a multi-million transfer deal, said he was upset his new side had lost 2-0 on his home debut.
"It's a pity that we lost the match," said Hulk, who came on as a half-time substitute.
"The fans' support was really tremendous and the atmosphere at the stadium was terrific. We should have won the encounter to show our gratitude to them. I'm really upset with the defeat."
The 26-year-old forward, who set a new Russian transfer record with his move to Zenit, which reportedly cost the Russian side around 60-million euros, said he was happy to join such a strong club.
"I know that the team is constantly growing. Zenit are already strong but they do not rest on their laurels. They move ahead day by day," Hulk added.
"And my main goal for the moment is to adapt myself to my new team's playing style and to get accustomed to my new teammates."
"It's a new phase of my career. I came here with a great desire to work and I want to keep on playing in the Russian league and win titles here and help Zenit to advance in the Champions League as far as possible."