Considering Leipzig managed to pull through, Freiburg needs to at least keep that fifth position, not that they won't be able to, because they are good enough to do it, but it would be a difficult task and it would be very upsetting for the fans who expected 4th and possibility of a big cup, and then drop to 6th instead.
The money difference is a lot as well, being 4th must mean a lot more money than being 6th by the end of the year. That is at least FM thought me, I remember clearly fighting for 8th spot in premier league, which meant nothing in the grand scheme of things, but mattered to me because it meant more money given to me and more money to spend on transfers lol.
With current situation most chances Freiburg will be at fifth and Leipzig will be at fourth because now we have only one match left into competition and Leipzig is going to face Arminia Bielefeld which is clearly the worst team in current season and having no win last ten matches is poor from them with this all now Leipzig is clearly favourite and can dominant this game with now Freiburg is having tough game against Bayer Leverkusen which is already at third spot and at home they have no good record with few loses in last matches but most chances they will try their best for ending this season at high note.
Freiburg is giving good time in away games, hopefully we will have some good fight from them as well even most chances they are going to be fifth at the end of this season.