Preview: Key Champions League games for Barcelona and Atletico Madrid

MADRID, Nov. 6 (Xinhua) -- FC Barcelona and Atletico Madrid are in Champions League action on Tuesday night to vie for the last-16 of the tournament.

Traveling to Hamburg to play Shakhtar Donetsk, Barca will look for three points to reach the knockout stage for the first time in three years.

Despite winning their first leg 2-1, Barcelona will be aware their rivals have an effective and brave passing game.