Bayern Munich coach Hansi Flick revealed he told Robert Lewandowski he was "surprised" the striker had not scored against Fortuna Dusseldorf before that changed on Saturday.
Lewandowski netted a brace in Bayern's 5-0 win and his double meant he has now recorded a goal against all 18 Bundesliga clubs.
Flick revealed how he had tried to inspire the striker, who moved onto 43 goals in all competitions this season.
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"I told Robert Lewandowski that I was surprised to hear at the press conference that he had not yet scored a goal against Fortuna Dusseldorf and that he should change that as soon as possible," he told a news conference.