Eintracht Frankfurt must contend with both illness and a rampant Bayern Munich while Hertha Berlin hope to halt high-flying Borussia Dortmund.

Here are five things to look out for in the Bundesliga this weekend:

Eintracht Frankfurt's squad has been hit by a virus ahead of Saturday's match at leaders Bayern Munich.

Bayern have scored 25 goals in six games, notably notching up a 10-2 aggregate win over Arsenal in the last 16 of the Champions League.

Germany's Jerome Boateng is set to make his first Bayern appearance after shoulder surgery.

Bayern drew 2-2 at sixth-placed Eintracht in October, but Frankfurt coach Niko Kovac has low expectations.

"If I can write the names of 18 fit players on the team sheet, I'll be happy," he said.

Defenders Michael Hector and Timothy Chandler, plus goal-scoring captain Alex Meier are amongst those affected by a stomach virus.

Hertha Berlin host Borussia Dortmund on Saturday with Pal Dardai admitting he abandoned pre-match analysis to watch Barcelona's stunning win over PSG.

The Hertha coach saw Dortmund's 4-0 Champions League win over Benfica on Wednesday on television, but switched channels to see the end of Barca's stunning 6-1 comeback win after his three football-mad sons protested.

"In all honesty, I turned over quick when I heard the score -- thank god -- because everyone who saw the Barca game can learn a thousand things," said Dardai.

Hertha suffered a shock 1-0 defeat at Hamburg last weekend and lost to Dortmund last month in a penalty shoot-out in the the German Cup round of 16.

The teams also drew 1-1 in Dortmund last October.

Hertha face a busy afternoon trying to contain Dortmund's Pierre-Emerick Aubameyang who has hit seven goals in three games, including a hat-trick against Benfica.

Tayfun Korkut makes his debut as Bayer Leverkusen coach against Werder Bremen on Friday in a final warm-up before their daunting Champions League clash at Atletico Madrid.

Leverkusen replaced Roger Schmidt with ex-Hanover boss Korkut, 42, following their 6-2 mauling by Dortmund.

Leverkusen have lost five of their last seven games and are 10th in Germany's top flight, 11 points away from the Champions League places.

Next Wednesday, Leverkusen will try to overturn their 4-2 home-leg defeat against Atletico.

"There is no reason to fight fires here," said Korkut. "I feel great willingness in the team, they are very eager, willing and highly motivated."

Leverkusen captain Lars Bender is doubtful, while Bremen skipper Clemens Fritz is out for the rest of the season with an injured ankle.

Bremen's ex-Arsenal winger Serge Gnabry is doubtful with a knee injury.

Second-placed RB Leipzig hope to have playmaker Naby Keita fit for Saturday's home match against Wolfsburg.

The Guinean midfielder injured his foot in last weekend's 2-2 draw at Augsburg, but an MRI scan has revealed only bruising.

Leipzig's top scorer Timo Werner, who has 14 goals, could pile more misery on Wolfsburg and new coach Andries Jonker, their third this season.

The Dutchman has come in with the 2009 German champions only above the relegation places on goal difference and began his tenure with a 1-1 draw against Mainz.

Relegation-threatened Hamburg want to back up last weekend's shock win over Hertha Berlin at home to Borussia Moenchengladbach on Sunday.

Despite taking 21 points from their last 13 league games, including wins over Leverkusen and Leipzig, Hamburg remain in the bottom three.

They are fighting to keep their status as the Bundesliga's only ever-present side, having appeared in every top-flight campaign since its inception in 1963-64.

"The blame lies with the first 10 games, when we took only two points," explained ex-Germany goalkeeper Rene Adler.

Under Dieter Hecking, who took charge in December, Gladbach have posted impressive recent wins over Ingolstadt and Schalke to climb to ninth.

Attacking midfielder Lars Stindl has scored four goals in his last five games.

Fixtures (all times 1330 GMT unless stated)