Robert Lewandowski scored twice as injury-hit Bayern Munich romped to a 3-0 league win over Eintracht Frankfurt on Saturday to warm-up for their Champions League quarter-final at Porto.
With second-placed Wolfsburg at Hamburg on Saturday night, league leaders Bayern took the chance to go thirteen points clear.
Lewandowski, the Bundesliga's top scorer last season, added to his tally to leave him with 16 goals for the season and third in the current rankings.
Frankfurt were missing the league's top scorer with Alexander Meier, who has 19 goals in 26 matches, out with a knee injury.
Coach Pep Guardiola has described Bayern's injury situation ahead of Wednesday's first-leg at FC Porto as 'very critical' with only 14 players fit to face Frankfurt.
"I've never known anything like it in my career," rued the Spaniard before the win.
Centre-back Medhi Benatia, who has a groin injury, joined flu-victim Bastian Schweinsteiger, plus wingers Franck Ribery, Arjen Robben and left-back David Alaba as just some of the stars on Bayern's casualty list.
Guardiola made Bundesliga history by naming four Spain internationals in his starting line-up in Pepe Reina, Xabi Alonso, Thiago Alcantara and Juan Bernat.
Despite their woes, Bayern needed just 15 minutes to take the lead at Munich's Allianz Arena when Lewandowski produced a world-class turn and volley.
The Poland star made sure of the three points when he headed home, with suspicion of offside, on 66 minutes.
Mueller added the third eight minutes from time when he fired home a seemingly-impossible angle.
Third-placed Borussia Moenchengladbach picked up their fourth straight league win with an impressive 3-1 victory over Borussia Dortmund.
Tenth-placed Dortmund went behind after just 29 seconds as Patrick Herrmann's shot was blocked by Borussia's Roman Weidenfeller, but Sweden left-back Oscar Wendt slammed home the parry.
Brazilian forward Raffel addded their second on 32 minutes after a strong run by Herrmann before Norway's Havard Nordveit fired home when left unmarked at the far post with 67 minutes gone before Ilkay Gundogan pulled a late goal back for Dortmund.
Bayer Leverkusen enjoyed a 3-2 win over Mainz as they consider terminating the contract of Bosnia international Emir Spahic, who is being investigated by police for allegedly assaulting a club steward.
South Korea striker Son Heung-Min opened the scoring with 15 minutes gone and Stefan Kiessling added a second early in the second-half.
Dead-ball specialist Hakan Calhanoglu added their third when he drilled homehis 73rd-minute free-kick, but Mainz pulled a goal back when South Korea international Koo Ja-Cheol converted two late penalties.
The win leaves Leverkusen fourth in the battle for one of the Bundesliga's three automatic Champions League places for next season.
Fifth-placed Schalke are now 10 points adrift of a Champions League place for next season after their goalless draw with relegation-threatened Freiburg.
Augsburg stay sixth in the league despite their shock 2-1 defeat at Paderborn, who picked up their first win since February to climb up to 16th.
It left Hamburg second-from-bottom as they bid to avoid a first relegation from Germany's top tier.