Serge Gnabry got the defending league champions off to a fast start with a goal in the third minute before Aleksandar Pavlovic doubled their advantage six minutes later.

There was another double strike around half an hour into the game, with Kane making it 3-0 from the penalty spot in the 25th minute before Luis Diaz added another three minutes after that.

Kane then added the cherry on the cake with his second of the game to put the Bavarians 5-0 up with another goal in the 62nd minute as HSV had absolutely no answers to Bayern's onslaught.

Elsewhere in the Bundesliga, Wolfsburg and Koln played out to a thrilling 3-3 draw with the action shifting from end to end for the entire game.

Luca Waldschmidt got things going early with a fifth-minute strike for Koln before Moham3ed El Amine Amoura levelled matters in the 42nd minute.

Wolfsburg grabbed the lead in the 65th minute thanks to a goal by Lovro Majer and it looked like they would cling on for a solid win before the chaos broke out late on.

Isak Bergmann Johannesson (90+1) restored parity at 2-2 before Maximilian Arnold seemed to have won it for Wolfsburg with a goal nine minutes into stoppage time.

However, the extended period of play at the end of the match had one last surprise as Jacob Kaminski scored to level matters at 3-3, 14 minutes after the 90 had concluded.

Freiburg grabbed a 3-1 win over Stuttgart despite being down for most of the game after Ermedin Demirovic scored for the visitors in the 20th minute.

The hosts had to wait until the 81st minute to get back on level pegging, thanks to an Igor Matanovic strike which opened the floodgates.

Derry Scherhant scored five minutes later to put Freiburg 201 up before Matanovic secured the points from the penalty spot two minutes into stoppage time.

Johan Manzambi was sent off eight minutes into stoppage time after an ill-timed challenge made contact with an opposing player's head.

RB Leipzig ground out a narrow but well-deserved 1-0 win away from home against Mainz thanks to Johan Bakayoko's 40th-minute goal, while strikes by Serhou Guirassy (33') and Maximilian Beier (45+6) earned Borussia Dortmund a 2-0 win over Heidenheim.

An der alten Forsterei Stadium hosted a ding-dong battle between Union Berlin and Hoffenheim, with the latter emerging 4-2 winners on the day.

Andrej Kramaric opened the scoring from the penalty spot in first-half stoppage time before Fisnik Asllani doubled their lead two minutes later.

After the break, Ilyas Ansah got Union Berlin on the board in the 49th minute before Asllani added his second of the game in the 51st minute to restore Hoffenheim's two-goal advantage.

The hosts got another one back through Tim Rothe in the 71st minute but Rothe was then sent off in the 82nd minute for a professional foul as the last defender, resulting in a penalty that Tim Lemperle converted to bring the score to 4-2 in favour of Hoffenheim.

In the final match of the day, Bayer Leverkusen got back to winning ways with an impressive performance against Frankfurt.

Alejandro Grimaldo gave Leverkusen an early lead with a 10th-minute strike before Patrick Schick's late first-half goal doubled their advantage.

Can Uzun got a goal back for Frankfurt in the 52nd minute but Grimaldo secured the points with his second goal ten minutes into second-half stoppage time, despite the hosts being reduced to 10 men thanks to Ezequiel Fernandez picking up two yellow cards.

Luis Diaz matches Bayern Munch record in blitzing start to life in Bundesliga