bundesliga.com takes a closer look at the sides' league struggles ahead of their Matchday 9 meeting...
There's still no sign of the panic button in Dortmund, but there's no denying these are trying times domestically. 14th-in-the-table BVB already trail league leaders FC Bayern München by 13 points at the halfway stage of the Hinrunde, with visitors Hannover only three points better off in tenth.
Pierre-Emerick Aubameyang (pictured) could be rested despite scoring twice in the 4-0 win over Galatasaray AS, with Ciro Immobile and Adrian Ramos candidates for the lone striker role. Midfield schemer Ilkay Gündogan managed 21 second-half minutes in Istanbul, while left-back Erik Durm is available again following a week out with a thigh strain.
(pictured) could make his first appearance since picking up an ankle injury in the 2-1 win over FC Schalke 04 on the opening day of the current campaign. Christian Pander will continue to deputise for injured left-back Miiko Albornoz, with Lars Stindl and Leon Andreasen likewise ruled out for the foreseeable future.
scored his first goal since late August in the midweek Champions League win over Galatasaray. The 25-year-old Germany attacking midfielder only returned to the starting line-up in Cologne last week following injury, but ominously for Hannover is fast approaching his pre-layoff best.
will go one-on-one with Japanese compatriot in the creative stakes on Saturday afternoon. The former 1. FC Nürnberg midfielder has often been overshadowed by Dortmund's returning Far Eastern star at international level, but possesses just as much quality in the final third.
Jürgen Klopp (Dortmund head coach, pictured): "It's our own fault we're in this position. We're under pressure."
Tayfun Korkut (Hannover head coach): "We want to remain above Dortmund in the table after the game."
Without a win in five, Dortmund fell to their third league defeat on the spin last time out, despite enjoying a 100 per cent winning record in the Champions League after three matches. Hannover have lost their last three and haven't scored since Matchday 5's 1-0 victory at home to Köln.
An early Reus penalty gave BVB all three points in last season's corresponding fixture. Jürgen Klopp's men then enjoyed a 3-0 victory on their travels to make it four wins from their last five meetings with Hannover, who haven't won in Dortmund since April 2008.
Dortmund: Weidenfeller - Piszczek, Subotic, Hummels, Sokratis - Gündogan, Kehl - H. Mkhitaryan, Kagawa, Reus - Aubameyang
Hannover: Zieler - H. Sakai, Marcelo, C. Schulz, Pander - Schmiedebach, Gülselam - Bittencourt, Kiyotake - Briand, Joselu