Feb 13 (Reuters) - Former South American champions Velez Sarsfield and Nacional endured a torrid start to their 2013 Libertadores Cup campaigns at the hands of two Ecuadorean sides. Argentina's Velez went down 1-0 away to Emelec thanks to an own goal by striker Facuando Ferreyra and had defender Fernando Tobio sent off after 62 minutes in their Group Four match on Tuesday. ... More...