Bayern Munich defender Jerome Boateng knows he faces a massive test against Real Madrid star Cristiano Ronaldo.

Bayern are preparing to host Real for the first-leg of their Champions League semifinal.

Boateng told Kicker: "No striker can be more complete than Cristiano, he can finish with the right, with the left, with his head and everything perfectly, and in front of the opposing goal he's like a machine.

"You cannot cancel him completely, he always manages to have chances in a match because he has an excellent sense of getting free and with great timing.

"Real Madrid's game is also tailor-made, which is why it's important to be compact as a team, to make changes to the wings and to give them as little space as possible."