On the opening night of the new Bundesliga season, Carlo Ancelotti's Bayern picked up where Pep Guardiola's Bayern left off, delivering a ruthless display of attacking football.
Bayern Munich 6 (Alonso 9, Lewandowski 13, 46, 77 pen, Lahm 66, Ribery 73) Werder Bremen 0
Robert Lewandowski scored a hat-trick as Bayern Munich got their quest for a fifth consecutive Bundesliga title off to a perfect start at the Allianz Arena.
Bayern, led by new coach Carlo Ancelotti for the first time in the league, scored twice in the opening 13 minutes as they delivered a statement of intent to Borussia Dortmund and the other pretenders to their domestic crown.
New signing Mats Hummels enjoyed a peaceful night at the back against Bremen's toothless attack, while 19-year-old Renato Sanches, a 35 million Euro acquisition from Benfica, remained on the bench.
Despite fielding their oldest starting 11 in the Bundesliga since December 2008 (average age of 29), Bayern started the game at a frenetic pace, piling forward in numbers at every opportunity in search of the opening goal against a Bremen side who seemed crippled by the fear of a thumping.
Carlo Ancelotti becomes the first coach to take charge of a team in each of Europe's top five leagues.
And Bayern, who were without the injured Jerome Boateng and Arjen Robben, did not have to wait long for the opening goal.
Latching onto a bouncing ball on the edge of the box, Xabi Alonso swiftly brought it under his spell and sent a dipping drive towards goal, with goalkeeper Felix Wiedwald beaten by the speed and swerve of the shot.
No sooner had Bremen picked themselves and dusted themselves down, Bayern were two goals to the good – and the second oozed just as much quality as Alonso's opener.
Franck Ribery spotted the run of Lewandowski with a sumptuous pass, but the Pole still had plenty to do. However, the striker bent a brilliant shot across Wiedwald and into the far top corner from the tightest of angles. All inside 13 minutes.
Bremen were fearing the worst at this point and rallied for the next few minutes, with coach Viktor Skripnik barking instructions from the edge of his technical area. Bremen responded with a decent spell of possession, but never managed a single shot at Manuel Neuer's goal and always appeared a ruthless Bayern counter-attack away from conceding another.
However, Bayern were wasteful for the remainder of the half and chances came and went for Thomas Müller and Lewandowski, who came closest to adding a third before the break but saw his shot deflect off Wiedwald and onto the bar.
If Bayern had shown any signs of complacency, Lewandowski extinguished those doubts 39 seconds after the restart, throwing himself at Müller's pinpoint cross from the right to make it 3-0, ending the game as a contest and throwing Skripnik's half-time team talk out of the window.
Bremen were now lambs to the slaughter, and Bayern captain Philipp Lahm joined the party in the 66th minute, powering a shot in off the post after a neat exchange with Müller.
Müller clocked up yet another assist when he cut the ball back for Ribery to lash in the fifth, with Lewandowski adding a sixth from the penalty spot after Thiago Alcanatara was tugged, eclipsing the 5-0 win Bayern enjoyed against the same opponents last season.
"We started well, the game was good," Ancelotti told Sky Sports. "We scored early and after that we had good control of the game, playing good football."
Bayern's closest title rivals, Borussia Dortmund, will be hoping to respond when they open their campaign on Saturday at home to Mainz, while the third and fourth placed teams last season – Borussia Mönchengladbach and Bayer Leverkusen – meet at Borussia-Park on Saturday evening.