Hm it is true that Freiburg did well in this season. I didn't expect from them that they would play such good gameplay in this season. But yeah, Leipzig is still good to play on champions league. Dortmund is not playing good what I expected from them.
The match is totally open. Team-wise, Leipzig is better. But Freiburg is playing a fantastic season and has a talented team and they have the momentum. Leipzig, on the other hand, was unfortunate to be knocked out of the EL and didn't perform well in the league after that. I would even slightly favor Freiburg.
I think Leipzig will take that 4th place they have an easier match at home and only need one point to keep it. While Freiburg have a much harder match to try and win it plus they need to pray that Leipzig losses so there chances are really low
You're absolutely right that Leipzig only need a draw against Bielefeld, to ensure they stay in 4th place. And I believe they will not take the risk
by aiming for a draw, Leipzig will definitely try to beat Bielefeld. Moreover, Bielefeld is a weak team in the relegation zone, it should be quite easy
for Leipzig to beat Bielefeld. Even so, Leipzig should not underestimate Bielefeld, because Bielefeld could surprise in the last round of the Bundesliga,
although there is very little chance Bielefeld can beat Leipzig. So I'm very sure that Leipzig will stay in 4th position, and can play in the Champions League next season.
If it came to a surprise that Leipzig were defeated by Bielefeld, I still believe that Leipzig is still in 4th place, because Freiburg who are in 5th place
have to face Leverkusen. Where Leverkusen is a fairly strong team in the Bundesliga and has better quality players than Freiburg, so it's very difficult
for Freiburg to beat Leverkusen.