Cologne - Goalscorers and results invariably dominate the headlines on any given Bundesliga matchday, but scratch below the surface a little and there are plenty more fascinating stories to unearth. shines a light on some of the most notable of them on Matchday 4...

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1) Last-gasp Müller

Even Thomas Müller admitted to feeling the nerves as he stepped up to take an injury-time penalty with the scores poised at 1-1 in Saturday's local derby against FC Augsburg. Unsurprisingly, however, the FC Bayern München forward slammed the ball into the net to give the defending champions a deserved 2-1 win that maintains their 100 per cent winning start to the campaign. Müller himself remains top of the Bundesliga scorers charts on six goals from four outings.

2) Imperious BVB

The fact Bayern are only second in the table, albeit on goal difference, speaks volumes for the performances of league leaders Borussia Dortmund. Die Schwarz-Gelben hit back from a goal down to vanquish Hannover 96 and extend their winning start under Thomas Tuchel to a club-record nine matches in all competitions, as well as achieving the best ever start to a Bundesliga season by any club.

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3) 'Little Pea' pops onto the scene

Javier Hernandez's Bundesliga debut ended in a surprise 1-0 defeat to SV Darmstadt 98, but the new Bayer 04 Leverkusen forward showed plenty of promise after being introduced to the BayArena faithful as a second-half substitute. The Mexico international went as close as any of his team-mates to netting the equalising goal, with his bullet header well saved by Darmstadt goalkeeper Christian Mathenia. You have to think it will only be a matter of time before he breaks his duck.

4) Lilies blooming

On the subject of Darmstadt, Saturday's win represented their first in the Bundesliga since 1982. At the start of the season, the Lilies were seen as most people's pick to be relegated, but unbeaten and with six points on the board from their opening four top-flight games, Dirk Schuster's men are proving no pushovers.

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5) Foals in the mire

At the other end of the spectrum, meanwhile, Borussia Mönchengladbach have endured a miserable start to 2015/16. The Foals slumped to a sorry 3-0 defeat at home to Hamburger SV on Friday - their fourth in as many outings this season - and remain rooted to the foot of the standings ahead of their UEFA Champions League group stage debut against Sevilla FC on Tuesday night.

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6) Meier back with a bang

How Gladbach could do with a striker of Alexander Meier's abiding quality right now. Following a 161-day injury lay-off, the veteran Eintracht Frankfurt forward needed just four minutes to open his account for 2015/16 in the Saturday evening game against 1. FC Köln. After notching again midway through the first half, last season's Bundesliga top scorer capped a resounding 6-2 success with his third of the night and the first league treble of the season.

7) Dream comeback

SV Werder Bremen earned their first away win of the season by scoring two last-gasp goals against TSG 1899 Hoffenheim. While that was a noteworthy achievement in itself, the real story was Claudio Pizarro’s return for his third spell as a Bremen player. The Peruvian announced his (re)arrival with a bang, coming off the bench in the 82nd minute to reinvigorate the Green-Whites’ attack and set up Anthony Ujah to put the visitors 2-1 ahead in the 90th minute.

8) Showing solidarity

The current plight of refugees in Europe has moved people around the world, and Germany football is certainly playing its part to help out. The Bundesliga clubs are leading by example, as could be seen by numerous sides opening their doors to refugees to watch live in the stadiums this weekend, with some refugee children even standing in as mascots. At FC Schalke 04’s Veltins Arena, the entire crowd took to their feet prior to kick-off in support of the club’s #StandUp campaign.

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9) Newcomers in focus

With the summer transfer window winding down at the end of August, a handful of Bundesliga clubs swooped to make some last-minute signings, many of whom made their debuts on Matchday 4. Hernandez had his first competitive outing for Leverkusen, Julian Draxler and Dante both appeared for Wolfsburg and Kingsley Coman donned a Bayern shirt for the first time. Check out how they fared in our picture gallery right here.

10) Ingolstadt making waves

Speaking of newcomers, debutants FC Ingolstadt 04 continued their impressive start to their maiden top-flight campaign. Ralph Hasenhüttl’s men held last season’s runners-up VfL Wolfsburg to a 0-0 draw on Saturday, their first ever Bundesliga point on home soil. Currently in ninth place with seven points from four games, the Bavarians have kept three clean sheets so far – a record unmatched by any other team this season.