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Mainz have earned 29 points in the Rückrunde, which equals their club record for an entire second half of a Bundesliga campaign. Bo Svensson has masterminded their about-turn in fortunes, the former Mainz midfielder and youth coach turning a five-point deficit on outright safety into a relatively sizeable cushion up in 12th place. Following a nine-match unbeaten run that includes a stunning win over champions Bayern Munich, the 05ers can no longer be relegated automatically. Five points clear of the relegation play-off spot with two games still to go, they're effectively home and hosed. Not that Svensson will rest on his laurels. The Dane has a pretty firm idea of his preferred starting line-up these days, and should recall defender Stefan Bell, who sat out the 1-1 draw with Eintracht Frankfurt through suspension.
Dortmund come into their trip to face in-form on the back of back-to-back wins over RB Leipzig, firstly in the Bundesliga last Saturday and then in the DFB Cup final on Thursday. Braces from Haaland and Jadon Sancho sealed a 4-1 win at Berlin's Olympiastadion to help Die Schwarzgelben to their first major title since 2017. Interim head coach Edin Terzic said after the win that "we have completed one of our two goals for the end of the season" with the other being UEFA Champions League qualification. After leapfrogging Eintracht Frankfurt into fourth, Dortmund know two wins from two will secure a top-four finish. Roman Bürki will keep his place in goal with Marwin Hitz ruled out, while Gio Reyna could earn a start should Terzic feel the need to rotate his squad following Thursday's final. Thomas Meunier, Julian Brandt and Thorgan Hazard are also candidates pushing for places in the first XI.
Match stats
Svensson has claimed 30 points from his first 18 matches as Mainz coach, losing only four times.
Karim Onisiwo and Robin Quaison are Mainz's joint leading scorers in 2020/21 with four goals apiece.
Nine matches without defeat is Mainz's best ever single-season streak, and currently the longest unbeaten run of any Bundesliga team.
Haaland has scored 16 of his 25 Bundesliga goals so far this term away from home. The record for single-season away goals - currently shared by Jupp Heynckes and Timo Werner - is 17.
Haaland (20) and Sancho (21) are the youngest players in Bundesliga history to reach 38 goals.
BVB have won all 10 Bundesliga games in 2020/21 featuring Lukasz Piszczek.
Probable line-ups
Mainz: Zentner - St. Juste, Bell, Niakhate (c) - da Costa, Barreiro, Kohr, Mwene - Quaison - Burkardt, Onisiwo
Out: -
Doubtful: -
Coach: Bo Svensson
Dortmund: Bürki - Piszczek, Akanji, Hummels, Guerreiro - Bellingham, Dahoud - Sancho, Reus (c), Reyna - Haaland
Out: Hitz (knee), Morey (knee), Moukoko (shin), Schmelzer (knee), Witsel (Achilles' tendon), Zagadou (knee)
Doubtful: -
Coach: Edin Terzic