Bundesliga leaders Borussia Dortmund look to extend their record start to the season when they face Hoffenheim away on Wednesday as their Bayern Munich showdown looms.

With five straight league wins, 18 goals scored and only three conceded, no other team has had such a good start to a Bundesliga season, yet Dortmund are top of the table ahead of Bayern only on goal difference.

The two teams clash at Bayern's Allianz Arena on October 4 in a mouth-watering showdown with Munich bidding to become the first team to win an unprecedented fourth straight league title this season.

Under new coach Thomas Tuchel, Dortmund have scored an average of more than three goals per game thus far and want a sixth straight league win -- their 12th overall this season -- at Hoffenheim to keep the pressure on Bayern.

"We need to just focus on ourselves, we mustn't let up and not let anything from outside influence us," said Tuchel, who replaced Jurgen Klopp.

"We noticed early on which players already have a lot of self-confidence and which need to develope it.

"There is real competition for places in the team. People want to take their chance to be on the stage and take responsibility."

Dortmund's 3-0 home win against Champions League side Bayer Leverkusen on Sunday was another positive step in proving their pedigree as genuine rivals to Bayern, who have won the Bundesliga at a canter for the last three years.

Last season, Dortmund flirted with relegation before finishing seventh and struggled to replace Robert Lewandowski after their main source of goals left for Bayern.

This season, Gabon striker Pierre-Emerick Aubameyang has bagged six goals in five games with right-wing Henrikh Mkhitaryan scoring three.

A total of eight players have netted league goals so far, meaning Borussia have also got more unpredictable.

Aubameyang's tally matches that of Bayern's Thomas Mueller and the pair are the league's current top scorers.

Hoffenheim are winless this season after four defeats and one draw which has left them just above the relegation places having been humbled 3-1 at Mainz on Friday.