Maicosuel's first-half goal was enough for Hoffenheim to grab an important away win at Freiburg and jump to fifth place.
The visitors controlled the game throughout and enjoyed the majority of the chances, but had only the solitary goal to show for their efforts. It came six minutes before the break when Maicosuel fended off two defenders just outside the area before turning and striking into the top right corner.
Freiburg have won only once in six matches in front of their own fans and have now lost four straight games to remain in 13th place.
Bochum stay in the relegation zone after going down 2-1 at Eintracht Frankfurt. Caio gave Eintracht the lead in the 14th minute only for Maik Franz's own goal to draw Bochum level 11 minutes later.
Franz netted at the right end eight minutes into the second half to move Eintracht up to ninth. Bochum ended the game with ten men after Japan international Shinji Ono was sent off with ten minutes to go.