Five goals after two Matchdays - that is something that not even Bayern Munich forward Robert Lewandowski had ever done before, until now.

The Pole had already opened his account for the season in the first round of the DFB Cup against Energie Cottbus, but his hat-trick against Schalke – his first of the new season and ninth in the Bundesliga all told – elevated Lewangoalski to yet another, previously unimaginable level.

And as if 207 goals in 292 Bundesliga appearances were not frightening enough, the 31-year-old delivered a pungent post-match warning.

"My own expectations in myself are always the highest, and I know I can always do better," he said.

Watch: Coutinho says Lewandowski is better in real life than on TV

Lewandowski's Matchday 2 one-man show completed a one, two, three for the Pole this season. After that strike against Cottbus, his 54th Bundesliga brace earned Bayern a point in their Bundesliga opener at home to Hertha Berlin before Saturday's hat-trick which drew him level in that currency with his own CEO Karl-Heinz Rummenigge, with only five players scoring more in Bundesliga history.

Bayern's next opponents Mainz - against whom Lewandowski has scored 14 in 14 games - had better be warned, although the forward – who has scored all of Bayern's goals so far this season – was quick to stress that he cannot succeed without the help of his colleagues.

"Of course a player can win a match on his own from time to time, but we win titles as a team," he said. "I always try to score, no matter who we're playing against.

"And we all need to know that the Bundesliga isn't an easy league and you've always got to be ready."

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That was evident on Matchday 1 in a draw which still rankles with Lewandowski.

"We've got to go from win to win, above all because we've already thrown away two points against Berlin," he said.

"Dortmund have got a really good squad and even if things are not going well, like on Friday in Cologne, they have the options to raise their game.

"But we are the champions, and we have been for seven years. We know, however, that Dortmund want to challenge us."

It helps, therefore, that Bayern were able to give Ivan Perisic and Philippe Coutinho debuts on Saturday, with Lewandowski welcoming the edge the two summer signings can give to an already sharp team.

"We've got a really good squad now and you could see that in the second half," he said.

"We were able to raise our game two or three times by bringing on fresh blood and that helps us all because we can train better, and it's a long, demanding season so we're always going to need fresh blood."

They don't need any transfusion at the top, although a clone of Lewandowski would come in handy. The Pole is so unique, though, that even modern science would be hard pressed to replicate such a goalscoring sensation, with heads being scratched trying to fathom how anybody can be quite as brilliant as Lewandowski.

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