MADRID, Dec. 2 (Xinhua) -- FC Barcelona coach Hansi Flick stressed the need for his players to work as a unit ahead of Tuesday's vital La Liga game away to Mallorca.

The match has been brought forward from early January when both sides are participating in the Spanish Supercup in Saudi Arabia and comes with Barcelona starting to offer serious doubts about its play in the wake of Saturday's 2-1 defeat at home to