Midfielder Yaya Toure insists Barcelona are favourites to beat Arsenal in their Champions League quarter-final clash

But the Catalans must be wary of Gunners star Cesc Fabregas.

Barca will travel to the Emirates Stadium on Wednesday night aiming to reach their third successive semi-final, and Toure is confident they can achieve their goal.

He said: "Barca are winning matches, despite our rivals changing their systems to cope with us.

"It is actually a positive for us because it demonstrates that we are able to obtain success against any rival.

"The tie against Arsenal will be different. The English practice a similar style to us."

"Who will be favourites? Barcelona, because we are the champions of Europe."

However, Toure is concerned about Arsenal's tactics and believes that manager Arsene Wenger will concoct a specific game-plan to contain Barca talisman Lionel Messi.

He continued: "I know Arsenal and Wenger and it is normal that they have planned any special system against us."

As a holding midfielder, the Ivory Coast international will go head-to-head with Gunners captain Fabregas, who is Arsenal's biggest threat.

Toure added: "Cesc Fabregas is a phenomenal player. The Spanish internationals at Barca have spoken sensationally about him and he will be a key man to stop in London.

"Arsenal have Fabregas but we have Messi. For me the Argentinean is the No.1 in the world without a doubt."