Bayern Munich warmed up for Wednesday's UEFA Champions League visit from Napoli with a 4-0 hammering of Bavarian neighbours Nurnberg in the Bundesliga.
It was Bayern's eighth straight win at home as Mario Gomez scored twice, while Bastian Schweinsteiger and Franck Ribery scored the others. However, the victory may have come at a high cost as Schweinsteiger limped off in the 71st minute and is an injury doubt for the Napoli game.
"Bastian took a kick to the calf. That is normally a very difficult injury, which takes time to recover," explained Bayern coach Jupp Heynckes. "We have to wait and see whether or not it is a calf strain. Then we can say more, but at the moment it doesn't look good."
Borussia Moenchengladbach were the last visiting team to score in Munich when they poached a shock 1-0 win on 7 August, but Bayern have since turned the Allianz Arena into a fortress by scoring 33 goals without reply.
The win extends Bayern's lead at the top of the Bundesliga table to four points, while they are two points clear at the top of Group A in the Champions League. "You can see from the reaction of the players they are having fun. That is very important to help play successfully," added Heynckes. "During the half-time break, I appealed to the players to keep a clean sheet and that's exactly what they did."
Before the weekend, goalkeeper Roman Weidenfeller of defending champions Borussia Dortmund said the Bundesliga title race was far from over, but on this sort of form, Bayern look unstoppable.
Dortmund held by Stuttgart
Dortmund themselves dropped to third in the table after they were held to a 1-1 draw at Stuttgart. German defender Serdar Tasci put Stuttgart ahead on 22 minutes, but on the stroke of half-time teenage star Mario Goetze put in a superb ball for Shinji Kagawa to square for Lukasz Piszczek to pull Dortmund level.
Schalke 04 took over second spot in the standings, four points behind Bayern, after they enjoyed a 2-1 win over Hoffenheim. Werder Bremen, meanwhile, moved up to fourth after they came from behind to win 3-1 at Mainz, makng their host's ninth league game without a win.
Gladbach are fifth in the table after Germany's rising star Marco Reus scored both their goals in a 2-1 win over Hannover.
Michael Ballack could be doubtful for Bayer Leverkusen's visit to Champions League Group E opponents Valencia on Tuesday after fracturing his nose during the 1-0 win over rock-bottom Freiburg on Friday. Ballack scored the only goal of the game after two minutes to boost his side's flagging league campaign, only to be forced off in the 65th minute after a clash with Freiburg's Jan Rosenthal.