Bayern Munich boss Jupp Heynckes has returned the pressure to Real Madrid by warning Robert Lewandowski is just as dangerous as Cristiano Ronaldo.
The prolific pair could line up as team-mates next season if Los Blancos' interest in the Poland international leads to a move.
But they will first meet as opponents at the Allianz Arena on Wednesday as Bayern host the European champions in the opening leg of a highly-anticipated Champions League semi-final.
While Heynckes acknowledged it will be difficult to stop Ronaldo - who has netted 15 goals in the competition this term - he issued a reminder of the danger facing Zinedine Zidane's men.