Pavel Krmas scored late in the game to hand Freiburg a 1-0 win over Fortuna Dusseldorf, a result that lifted the hosts to fifth place in the Bundesliga.
Krmas converted the only goal of the match - only Freiburg's second in four matches since the winter break - in the 87th minute.
The home side hit the post before and after that goal as they had the best of the chances.
Victory took Freiburg to 31 points, level with Mainz and Hamburg, while Dusseldorf remained on 24 points, eight clear of the drop zone.
Sascha Molders scored a second-half equaliser but relegation-threatened Augsburg could not find the winner they needed in a 1-1 draw with 10-man Mainz.
Adam Szalai had put Mainz ahead two minutes before the interval, but the visitors were reduced to 10 men in first-half stoppage time when Shawn Parker was sent off for a bad tackle on Augsburg substitute Michael Parkhurst.
The hosts soon capitalised on their extra man, Molders restoring parity 12 minutes after the restart, but they could not force a winner.
Augsburg are nine points behind fourth-bottom Fortuna Dusseldorf.
