Cologne - Thomas Tuchel's return to his former haunt tops the pre-match agenda ahead of Borussia Dortmund's trip to 1. FSV Mainz 05 on Friday night (kick-off 20:30 CEST/ 18:30 GMT), but what else is there to look forward to in Matchday 9's opening fixture?

bundesliga.com reveals all...

1) Tuchel's homecoming

Do not expect Tuchel to be greeted by boos and whistles when he emerges from the tunnel at the Coface Arena. The 42-year-old returns to his old Mainz stomping ground for the first time since resigning as head coach in May 2014, but does so as the most successful strategist in the club's history, having presided over ninth-, 13th- (twice), fifth- and seventh-placed finishes during a five-year spell at the helm.

© gettyimages / Alexander Hassenstein

2) Winless streak

In another first for Tuchel, the former Mainz boss is going into the game on the back of his maiden defeat as Dortmund head coach. With Die Schwarz-Gelben only drawing with TSG 1899 Hoffenheim and SV Darmstadt 98 prior to a crushing 5-1 defeat to FC Bayern München in Der Klassiker, they have also gone three games without a league win, their longest such spell since 13 December 2014 - 7 February 2015 (five matches).

© gettyimages / Dennis Grombkowski

3) Familiar faces

Tuchel is not the only one who knows his way around the Coface Arena. Dortmund midfielder Jonas Hofmann scored three goals in 12 Bundesliga appearances for the Rhineland-Palatinate club during an injury-hit loan spell last term, while South Korea international left-back Joo-Ho Park spent two full seasons on the Mainz books before joining BVB in the summer.

4) Omens

Mainz won last season's corresponding fixture 2-0, but their overall record against BVB does not make for pleasant reading. In the two sides' last ten Bundesliga match-ups, the 05ers have won one, drawn one and lost eight, keeping just the one clean sheet.

© DFL DEUTSCHE FUSSBALL LIGA / Grimm

5) New experience

Martin Schimdt will have the pleasure of Dortmund's company for the first time on Matchday 9. The 48-year-old was installed as Mainz head coach on 17 February this year, just four days after Kasper Hjulmand's final game in charge of the club: a 4-2 reverse at the hands of, you guessed it, BVB.