The Iranian midfielder, on loan from Fulham, is aware of the game's significance as third-bottom Forest look to join Barnsley on 44 points with victory at Oakwell.
Teymourian told the club's official website: "It's a big game for us and we have to make sure we go out, play well and get three points. If we play as well as we did against Crystal Palace and Derby then I'm sure we will win.
"We played very well at Derby and created a lot of chances. Hopefully we will put that part right and score some goals on Saturday.
"We played really well and did everything apart from score. Derby did not show anything against us.
"I want to go out there and give 100%. We win as a team and lose as a team.
The Barnsley fans are brilliant and we will look to make them very happy this weekend."