MANCHESTER (Reuters) - Frank Rijkaard called on his Barcelona team to be brave and organized in Tuesday's Champions League semi-final second leg at Manchester United.

Barcelona's recent form is poor, recording one win in nine league matches and having gone three games without a goal including Saturday's 2-0 defeat at Deportivo Coruna.

"Occasions like this are what footballers dream of," coach Rijkaard told a news conference on Monday. "While I respect United we have to believe in ourselves.

"The key thing will be keeping organized and playing the way we want to play. We have to be brave. It will take a big effort to get through."

Dutchman Rijkaard knows Barcelona face a difficult task as United have won their last 11 home games in the Champions League.

But Gianluca Zambrotta said victories at Celtic and Schalke 04 in the knockout stages of the competition gave Barcelona good reason to be confident.

"We have had difficulties getting results away from home in the league," said the Italian defender. "Fortunately in the Champions League we have managed to improve our away form.

"Without a doubt it's the most important game of the season. We have an experienced group of players and that will be important for us.

"We know with a victory we will be in the Moscow final and that's what we are going all out for."

United have gone three games without a win and Saturday's 2-1 defeat at Chelsea means they could miss out on a trophy this season if their bad run continues.

"We could say both teams are showing signs of tiredness," said Zambrotta. "We both want to get to the final but both sides have shown signs of wear and tear."

Barcelona will be strengthened from the first leg by the return from suspension of captain Carles Puyol, although the banned Rafael Marquez misses out.

(Editing by Tony Jimenez)