The Bayern Munich captain has suffered at the hands of the Spanish giants in the past and knows the German title holders must be on their guard
Philipp Lahm is wary of Real Madrid's threat on the counter-attack ahead of Bayern Munich's trip to Santiago Bernabeu for Wednesday's Champions League quarter-final.
Madrid and Bayern have met 22 times previously in the competition - more than any other clubs - and the Spanish giants destroyed the Bundesliga leaders 5-0 on aggregate in the semi-finals three years ago.
Bayern dominated possession in the first leg of that clash but Karim Benzema's goal earned Madrid a 1-0 lead at home, which they compounded with a thrilling display at the Allianz Arena, and Bayern captain Lahm said his side have to learn lessons about Madrid's danger on the break.