Veljko Paunovic and Patrick Vieira, two former opponents on the pitch in Europe, were brought together again on MLS Opening Day when each made their club head coaching debuts with the Chicago Fire and New York City FC, respectively. With the two teams set to square off again Sunday at Yankee Stadium (6 p.m. CT, FOX Sports 1), take an All-Access look at their memorable opening day clash, courtesy of MLSsoccer.com.