It is a record that has stood for 43 years, but it would appear Gerd Müller's single-season haul of 40 Bundesliga goals is under serious threat in 2015/16.

Leading the charge with 23 goals in as many appearances so far this term, FC Bayern München striker Robert Lewandowski's astounding double-digit return only narrowly shades that of Borussia Dortmund forward Pierre-Emerick Aubameyang, who took his own tally to 22 against TSG 1899 Hoffenheim last weekend.

In true Texas shoot-out style, the in-form goal-getters face off on Saturday evening as second-in-the-table BVB host Bundesliga leaders Bayern in Der Klassiker.

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'An exceptional striker'

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"He's a goal machine," Dortmund captain Mats Hummels said of former Schwarz-Gelben team-mate Lewandowski earlier in the campaign. "You can enjoy his goals, even as part of BVB. I had an incredible smile on my face when he scored his five goals against Wolfsburg [on Matchday 6]. He's just an exceptional striker."

Lewandowski has underlined his credentials as one of world football's most polished strikers on a near-weekly basis since that historic night against the Wolves. The 27-year-old Poland international has scored at least once in 14 of his 23 starts so far this season, including two against BVB in October, and recently became the first player since the legendary Müller (1974/75) to register 23 goals after 23 Matchdays.

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Aubameyang emerges from Lewandowski's shadow

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It goes without saying Lewandowski is enjoying his best spell in a Bayern shirt since leaving BVB in summer 2014 - he scored 17 goals in 31 Bundesliga appearances in his first season at the club - but he is not alone at the top of the 2015/16 scorers charts. Hot on the heels of his former teammate, Dortmund's Aubameyang has evolved into one of the German game's most complete strikers.

The signs were there when the 2015 African Footballer of the Year finished his second campaign in Dortmund colours with an impressive 16 Bundesliga goals to his name (12 of which came from his favoured centre-forward position) yet is only under Thomas Tuchel that the 26-year-old has truly began to resemble the famous Pole who fired BVB to a domestic double in 2011/12.

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Designs on Club 40

Having already surpassed the 20-goal-mark for the first time as a Dortmund player, Aubameyang now looks a near certainty to go on and break the 30-strike barrier. Mathematically speaking, were the AC Milan youth product to continue scoring at his current rate of 1.43 per game between now and May, he would finish 2015/16 on 36 goals. 'Legendowski', meanwhile, could even reach the gold-standard 40 (1.65 goals per game).

Fitness and form are the obvious caveats for both men, but for now there seems to be no reason whatsoever why this season's leading marksmen cannot sustain their seemingly ceaseless march to Müller's throne in an already multiple-record-breaking Bundesliga campaign. What better stage to do so than in Der Klassiker.

Christopher Mayer-Lodge