Barcelona sporting director Andoni Zubizarreta has admitted that it will not be easy for his team to progress to the knockout stages of the Champions League this season.

The Catalan giants have been drawn against Celtic, Benfica and Spartak Moscow in Group G, and Zubizarreta is not underestimating their opponents.

"Whenever we are involved in a draw we are satisfied," UEFA.com quotes Zubizarreta as saying.

"I see our group as being what I call a 'footballing' one, and one that will be filled with passion and contrasting styles.

"Every team will look to test us. It's going to be an interesting section to start with."

Barcelona will host Valencia at the Nou Camp in La Liga on Sunday.