Bayern Munich midfielder Javi Martinez believes that Sergio Busquets is the key to Barcelona's recent success.
The Bundesliga side face the Blaugrana in the semi-final of the Champions League next Tuesday.
And the former Athletic Bilbao man has admitted that his fellow Spain international will be one of the men to stop.
“Sergio Busquets is a key player for Barca,” he told the club's website.
“There are others who get more headlines, but this Barca team have won so many titles thanks in large part to him.
“Sergio Busquets is the key player for Barca. He always keeps his position and sets up players like Xavi and Iniesta who can go forward knowing that their backs are covered.
“I think this is the ideal moment for us to face Barca, but the problem is that they are also in good form.”