New WWE U.S. Champion Alberto Del Rio refuses to comment on his unlikely new ally Zeb Colter.More ACTION on WWE NETWORK : \rbr\rbrWith Zeb Colter in his corner, Alberto Del Rio answers John Cenas U.S. Open Challenge to capture the U.S. Title: Courtesy of the award-winning WWE Network.\rbr\rbrWith Zeb Colter leading the way, Alberto Del Rio makes a surprising return to WWE to accept John Cenas U.S. Open Challenge: Courtesy of the award-winning .