The clash between reigning Ballon d'Or winner Cristiano Ronaldo and the hugely under-rated Philipp Lahm will play a key role in determining the result of the first leg.
Ronaldo's blistering form this season was cut short by a hamstring injury that has seen him miss Real Madrid's last four games. However, the club's official website said CR7 completed a full training session on Monday, meaning the Portuguese star looks good to return to action against Bayern Munich.
On his day, Ronaldo is simply unplayable and unstoppable. But if there's one player in world football with the talents to stop him, it's Lahm. Bayern's coach Pep Guardiola—who coached the likes of Xavi, Iniesta and Messi at Barcelona—described Lahm as the most intelligent player he ever coached, in comments made to UEFA.com. So intelligent in fact, that he has often deployed Lahm in midfield to make use of his all-round talents.
Up against the threat of Ronaldo however, Lahm is likely to take his place at right-back. If Lahm keeps Ronaldo in his pocket, it will mean Real Madrid's most lethal attacking threat is neutralized. If Ronaldo has Lahm on the back-foot, however, Bayern could find themselves under the cosh.