Karim Benzema has been ruled out for seven days and could therefore miss the first leg of Real Madrid CF's UEFA Champions League first knockout round tie against Olympique Lyonnais.

The 22-year-old, who joined Los Merengues from Lyon in last summer, complained of discomfort in his left leg while training on Tuesday and is expected to be absent for a week with swelling to his groin. The nine-time European champions visit the Stade de Gerland on 16 February, with the return in the Spanish capital on 10 March. Benzema has scored seven league goals in 19 appearances for Madrid, having struck 43 times in 112 games for Les Gones.