I cast the chart for the moment when I understood your question: 11 Mar. 2015 5:39pm Beograd, Srbija ASC=21Vi49
Barcelona is represent with 1st house ruler Mercury, their oponents are represent with 7 house ruler Jupiter rx.
If we look dignities they are in slight favor of the Jupiter rx. Next Jupiter rx is in the House of Joy another + for oponents.
Mercury has aspect with Moon in fall so that does not help it. Also, Mercury has aspect (we look for aspects within +/- 3 degrees) with POF on most unfortunate fixed star Algol, so again that does not help Mercury.
Jupiter rx has aspect with dignified Mars (in its own sign), this helps Jupiter a lot. So to me it seams that Barcelona will not be the winner.
I cast the chart for the moment when I understood your question: 11 Mar. 2015 5:39pm Beograd, Srbija ASC=21Vi49
Barcelona is represent with 1st house ruler Mercury, their oponents are represent with 7 house ruler Jupiter rx.
If we look dignities they are in slight favor of the Jupiter rx. Next Jupiter rx is in the House of Joy another + for oponents.
Mercury has aspect with Moon in fall so that does not help it. Also, Mercury has aspect (we look for aspects within +/- 3 degrees) with POF on most unfortunate fixed star Algol, so again that does not help Mercury.
Jupiter rx has aspect with dignified Mars (in its own sign), this helps Jupiter a lot. So to me it seams that Barcelona will not be the winner.