Zenit St Petersburg defender Emanuel Mammana has warned Celtic they face just as intimidating an atmosphere in Russia as their own fans produced in the first leg of their Europa League tie.
The Argentinian admitted he and his team-mates were affected by the Parkhead atmosphere as they fell to a 1-0 defeat last week thanks to Callum McGregor's second-half strike.
But the centre-back claims Zenit will overturn their deficit with no problems tomorrow.
The St Petersburg Stadium is heading for a 56,000 sell-out for the Russian side's first match of the year following their winter break. Mammana said: "We made a lot of mistakes at Celtic Park, we have carefully analysed what went wrong and watched the video.
"We made quite a lot of mistakes during the match, some very simple ones. There were a number of reasons, it being the first match after the break, the pressure from their crowd.
"I can admit that we were very worried in the first few minutes, we constantly lost the ball when making some really basic passes.
"It was a shame to concede, but losing 1-0 away in the knockout rounds is not a disaster.
"We must always win at home. We are focused and the fans will help us. I'm sure Celtic will feel the atmosphere in our stadium is comparable to theirs."