Cologne – Borussia Dortmund on fire, a new wing wizard set to go on the rampage in Sinsheim and the 'masters of efficiency' – these are just a few of the main topics to be touched on this weekend in the Bundesliga. has the five most important things you need to know about Matchday 2.

Keeping up with Costa

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He was the big winner of Matchday 1: Douglas Costa, FC Bayern München's new turbo-prop winger with a propensity to deliver the most spectacular of crosses and shots (see: 'Costa steals the show'). His first Bundesliga journey outside of Bavaria in a red shirt takes him to Sinsheim, where many of his compatriots have already found a haven, including one man who played a key role in Costa joining Bayern in the summer.

"I gathered some information from Roberto Firmino," Costa told "He had plenty of good things to say about it." Although he will not come across his compatriot, who has since moved to England, Costa's arrival has ensured another star Brazilian is strutting his stuff in the Bundesliga, where he already feels at home. “My first impressions have been great,” Costa said. “Right now, I’m just enjoying being with the team and getting to know my team-mates […] I have to train hard and train well, but I think it’s all going well. It’s a fantastic club."

Dortmund's battle cry

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After an emphatic 4-0 win over Borussia Mönchengladbach on Matchday 1, Thomas Tuchel admitted he was himself quite surprised by his team's performance. "I didn't expect that!" he said after a game which decreed in no uncertain terms that BVB are back after a season of relative struggle.

Their hunger for success seemed restored during and after the game. "We want to dominate as many games as we can and leave no doubts about us winning them," said captain Mats Hummels, who nevertheless maintained an air of caution. "We know it was good, but we've got to keep things this way. We mustn't sit back after just one game." Proof will be in the pudding they serve up against FC Ingolstadt 04 this Sunday. Remember, Dortmund won 4-0 on the opening day of the 2013/14 season, and then they won another four on the trot, but still finished 19 points off the top.

Record hunt

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The Bundesliga is on the hunt for new records! Clubs and players set new stunning best marks every season, and 2015/16 is to be no different. Whether it be the lightning-fast goal scored by Karim Bellarabi at the start of 2014/15 against Dortmund or the 884 minutes Timo Hildebrand went without conceding for VfB Stuttgart in 2003/04 – there are plenty of records there to be beaten (see: 'The Bundesliga's standout records').

On Matchday 2, there are plenty of records which can be broken, or at least neared, such as in FC Bayern's trip to Hoffenheim, where the record champions can move to within eight more wins of 1,000 in the Bundesliga – a mark which, being realistic, is likely to be reached and surpassed at some stage of this term.

Masters of efficiency

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To score goals, you have to take shots. Simple? Well, Stuttgart appeared to have got the basics right in their opening game of the season against 1. FC Köln, yet it still did not amount to much. A total of 28 shots on goal were not enough to prevent them from being beaten at home by the Billy Goats for the second season running.

Maybe Stuttgart should take a leaf out of Köln's book, Peter Stöger's charges proving to be the masters of efficiency by turning nine shots into three goals – as cool as ice. VfL Wolfsburg also underlined their efficiency with two goals coming from just five attempts against Eintracht Frankfurt. These two masters of minimalism come head-to-head on Matchday 2, when we will see who is coolest in front of goal.

1-0 does not mean a win

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It is often said that if you take a 1-0 lead, you are on your way to three points. That is not always the case, but if you are a Hamburger SV fan, you certainly will be encouraged to see the Red Shorts score first against Stuttgart this Saturday. In their 101st duel on Saturday, they can take comfort from never before having thrown away a 1-0 lead to lose to the Swabians.

Köln would also be well advised to find the back of the net first against Wolfsburg, since they have only picked up two draws from the ten games in which they have fallen behind to the Wolves. On the other hand, Hoffenheim's fans have every right to be a little reserved about the way they celebrate if their side take the lead against Bayern on Saturday: they have led five times against the record champions but are still yet to beat them in 14 meetings.