Bunches of grapes hang on a vine of the Segura Viudas vineyard, on July 7, 2015 in Sant Sadurni D'anoia, near Barcelona. Decades of successful exports have bolstered the confidence of the Catalan cava sector so much so they are about to embark on a 'second conquest of the world ' facing off against the prestige sparkling wine king, French champagne.  AFP PHOTO / JOSEP LAGO  TO GO WITH AN AFP STORY BY DANIEL BOSQUE        (Photo credit should read JOSEP LAGO/AFP/Getty Images)