bundesliga.com has rounded up the best of the facts and figures from the opening weekend of the 2014/15 Rückrunde...
4 - Schalke started the new year with a win for the fourth time in as many years.
50 - Max Meyer played his 50th Bundesliga game against Hannover, becoming the third-youngest player to reach that landmark at 19 years and a half. His team-mate Julian Draxler was younger, as was former Borussia Dortmund defender Marc-Andre Kruska.
10 - In Germany, a distinction is made between a hat-trick and a 'pure' hat-trick. The latter version is when a player scores three goals without anybody else scoring in between. That is what managed on Matchday 18, becoming the first substitute in more than ten years to score a 'pure' hat-trick. Miroslav Klose was the last in September 2004 when he netted three for Bremen in Bochum.
1 - That Petersen hat-trick was the first ever 'pure' hat-trick by a Freiburg player in the Bundesliga.
12 - After losing to 1. FSV Mainz 05, SC Paderborn 07 dropped to their lowest league position since their promotion to the Bundesliga - 12th.
8 - Paderborn have now gone eight games without a win - currently the longest winless run of any team in the Bundesliga.
5 - Paderborn's 5-0 defeat to Mainz was their heaviest ever defeat in the top flight.
50 - In their 50th season in the Bundesliga, FC Bayern München will once again fail to go the distance without losing - a feat no side has yet managed in Germany's top flight.
4 - For the first time since 4 April 2009, FC Bayern conceded more than three goals in a Bundesliga game. Their opponents that day were also VfL Wolfsburg, who beat them 5-1 over five years ago. This time around, the Wolves had to make do with a 4-1 win.
18 - Last season, FC Bayern lost their first game on Matchday 29. This time, the Bavarians have been defeated as early as Matchday 18. It was the first league loss under Pep Guardiola when the Bundesliga title had not already been decided.
100 - (100th Bundesliga game) and (100th game for Wolfsburg) both reached milestones in their 4-1 win over Bayern on Friday night.
2 - grabbed his first brace in the Bundesliga as 1. FC Köln defeated Hamburger SV 2-0.
46 - ' goal for Eintracht Frankfurt after 46 seconds was the quickest goal SC Freiburg have ever conceded in the Bundesliga.
69 - Dortmund are bottom of the Bundesliga, and 35 of the 51 teams who have been bottom after Matchday 18 have ultimately been relegated - a ratio of 69 per cent.
342 - There were a total of 342 tackles in Leverkusen's goalless draw with Dortmund - a new record for the 2014/15 campaign.
15 - Bayer 04 Leverkusen and Borussia Dortmund supplied the 15th goalless draw of the season, more already than in the whole of last season.
179 - HSV fell to the 179th home defeat in their history - the most defeats of any club at home in the top flight.
117 - In his 117th Bundesliga appearance, Klaas-Jan Huntelaar received his first straight red card (he had previously been sent off for two bookings).
5 - Köln's win at Hamburg was already their fifth away win of the season - only Bayern have won as many on their travels. At home, on the other hand, Köln have won only once.
6 - VfB Stuttgart have not managed to win any of their last six home games. No other side in the Bundesliga has picked up fewer points at home than Stuttgart (five from a possible 27) this season.
5 - Scoring has also proven problematic for Stuttgart at the Mercedes-Benz Arena with Saturday's defeat their fifth in a row without a goal - a new club record.
7 - Augsburg have won seven of their last eight home games, losing only to league leaders FC Bayern.