Borussia Dortmund sweat on fitness of Mats Hummels for Bayern Munich clash

Wolfsburg's Xaver Schlager vies for the ball with Borussia Dortmund's Erling Haaland. EPA

Borussia Dortmund's Raphael Guerreiro celebrates scoring their first goal. Reuters

Raphael Guerreiro celebrates scoring Dortmund's first goal. Reuters

Dortmund and Wolfsburg players observe a minute's silence in homage to the victims of Covid-19 pandemic. AFP

Bayer Leverkusen's Sven Bender and Kerem Demirbay in action with Borussia Moenchengladbach's Jonas Hofmann. Reuters

Moenchengladbach's and Leverkusen's players leave the pitch at half time. AP

Leverkusen midfielder Charles Mariano Aranguiz, left, and Moenchengladbach midfielder Florian Neuhaus vie for the ball. AP

Marcus Thuram of Borussia Moenchengladbach is challenged by Kerem Demirbay of Bayer 04 Leverkusen. Getty Images

Leverkusen's Kai Havertz, 3rd left, celebrates with teammates scoring. AP

Freiburg midfielder Janik Haberer (C) and Bremen defender Kevin Vogt and midfielder Maximilian Eggestein vie for the ball. EPA

Freiburg defender Manuel Gulde (R) and Bremen forward Joshua Sargent vie for the ball. EPA

General view inside the stadium during the match between Freiburg and Bremen. Reuters

Players observe a minute of silence to commemorate the victims of the coronavirus pandemic, prior to the match between Freiburg and Werder Bremen. AP

Dennis Srbeny (C) of SC Paderborn celebrates with teammates after scoring against Hoffenheim. EPA

Substitute players of Hoffenheim wear protective masks and watch the match from the stands. EPA

Paderborn midfielder Sebastian Vasiliadis (C) vies with Hoffenheim midfielder Sebastian Rudy (L) and defender Stefan Posch. AFP

Borussia Dortmund are sweating on the fitness of key defender Mats Hummels for Tuesday's Bundesliga top-of-the-table showdown at home to leaders Bayern Munich.

The 2014 World Cup winner aggravated his Achilles tendon in Saturday's 2-0 win at Wolfsburg which kept second-placed Dortmund four points behind leaders Bayern, who are chasing an eighth straight league title.

Hummels was replaced at half time on Saturday but will be keen to to face his former club whom he spent three years with before transferring back to Dortmund in 2019.

"Mats has a problem with his Achilles tendon and we hope he can play on Tuesday," said Dortmund sports director Michael Zorc.

"He has had the problem for a while."

Hummels was treated at Dortmund's training ground on Sunday and if he is not fit, Emre Can, who replaced Hummels in Wolfsburg, will most likely deputise against Bayern.

Bayern coach Hansi Flick has fitness concenrs of his own with midfielder Thiago Alcantara and defender Jerome Boateng struggling with groin and muscle strains respectively.

Alcantara sat out Saturday's 5-2 thrashing of Eintracht Frankfurt in Munich while Boateng came off late in the second-half.

Bayern hammered Dortmund 4-0 at the Allianz Arena in Munich when the teams last met in November.

The Bundesliga became the first top European league to return during the coronavirus pandemic last weekend with all matches played behind closed doors.