It is the side's return to the World Cup since a quarterfinal finish on their debut at Korea/Japan 2002.
“Poland, Japan, Colombia – that’s a tough group," Mane said, as reported by The Mirror.
"But you have to believe in yourself and believe in what you are doing all the time.
“You try to do the job all together and hopefully we will qualify from the group.
“Honestly, personally, I don’t know the word ‘pressure’ because I enjoy my job all the time.
“The main man all the time is the Senegal team, which makes us really good.”
Senegal will open their 2018 campaign against Poland at Otkritie Arena in Moscow on June 19.
The Lions then face Japan at Central Stadium in Yekaterinburg on June 24, before rounding off their group exercise against Colombia at Cosmos Arena in Samara four days later.