Stuttgart remained in the running for the Bundesliga title with a hard-fought victory over Energie Cottbus.
Thomas Hitzlsperger struck in the 19th minute and Cacau decided the game with his goal in the 78th to extend Stuttgart's undefeated streak to nine games.
Markus Babbel's team has won eight games in that stretch and improved to 64 points and third place - level on points with Bayern Munich and two behind leaders Wolfsburg.
Cottbus lost their fourth game in the last six to remain 17th - three points from safety.
Stuttgart's star striker Mario Gomez was unable to start the game due to adductor muscle problems.
But his replacement Ciprian Marica had the first opportunity of the game after six minutes, heading Roberto Hilpert's cross just wide. And Stuttgart striker Cacau struck the side netting six minutes later.
Stuttgart went ahead in the 19th minute from a free-kick by Hitzlsperger, whose long ball from the right side went untouched through the box and in off the left post of Gerhard Tremmel's goal.
Cottbus had very little to offer despite desperately needing points and Stuttgart controlled play - Timo Gebhart's eight-yarder going just over the crossbar seven minutes before the interval.
Stuttgart nearly doubled the lead six minutes after the break but Tremmel got his hand on Hilbert's attempt from five yards at the far post.
Cottbus finally woke up after the break and Dennis Sorensen's header went just wide from five yards in the 51st minute.
Stuttgart keeper Jens Lehmann then needed a fine stop to deny Timo Rost's shot from 20 yards two minutes later.
Cottbus just missed equalising with 14 minutes left as Jiayi Shao tricked Khalid Boulahrouz to get space, but his left-footer from 10 yards rebounded off the crossbar.
And Stuttgart finished off the match with a counter-attack goal two minutes later.
Martin Lanig passed onto substitute Gomez, who found Cacau in the area who chipped in at the far post.