sentences:  Polo has toured South America with the Spanish National Orchestra with Raphael Frühbeck de Burgos conducting, and has played with the Opera Orchestra of Nice, the National Orchestra of Bordeaux, Prague Chamber Orchestra, Basel Philharmonic, the Monterey Symphony Orchestra, and the Israel Philharmonic.Conductors with whom he has appeared as soloist include Christian Badea, Gunther Herbig, Antoni Wit, and Arturo Tamayo.In 2006 he performed at Carnegie Hall in New York City.