Leipzig are in a very comfortable condition now in fact even though they still carry the risk of losing the Champions League spot to Freiburg on the final week. Because even if Leipzig draw with Bielefeld, it's enough for them to secure their current place in the league table. Bielefeld's chance to make it to play-out stage is not too high. So if Leipzig score first, then they'd demoralize Bielefeld players easier. Freiburg should get ready to say goodbye to that spot as they messed up last week.
Leipzig will be more confident as they only need a draw, but they will definitely reinforce their position by winning this match. However, their opponents are far below them in terms of performances this season. And I think it's also true, they need a quick goal so they are more comfortable with their game.
There is nothing that Bielefeld's team can do to beat Leipzig's team in their last meeting in the Bundesliga which will take place on 14 may although Bielefeld may have a chance to draw with Leipzig's team until the game ends but their chances are very slim and almost impossible because their Leipzig team will certainly play as hard as possible to get points so that they remain safe in the fourth position of the standings.