The 27-year-old scored his third goal in a week in Sunday's tight meeting with Hoffenheim, giving coach Jupp Heynckes a selection headache
The Germany international's first-half strike was sufficient enough in ensuring Jupp Heynckes' men collected three points and moved nearer to stripping rivals Borussia Dortmund of their Bundesliga crown.
And speaking to the club's official website, the 27-year-old was unequivocal in his assertion that Bayern's efficiency was a key factor in the result: "We did not play well but we won. Efficiency is the right word. We have had many games where we had so many chances to score but we didn't today. These games you have to win - and we did.
"Hoffenheim defended aggressively. As a striker you need to be opportunistic in games this tight - and I was. I'm glad I made the difference.
Meanwhile, midfielder Bastian Schweinsteiger echoed the sentiments offered by his team-mate in the aftermath.
He added: "We had many periods of inactivity in the game. It was not our best performance, but we are all very happy to have won."
Bayern remain 17 points clear of second-placed Borussia Dortmund with 10 games of the league season still to play.