Last year, with D.C. United at the bottom of the East while Atlanta United was drawing unanimous praise, you’d expect that the newcomers would have wiped the floor with MLS’s first champions. Instead, the Black-and-Red beat ATL three times running, confounding expectations and league-wide observers every time. Today in Georgia, United will be looking for win number four against the Five Stripes, but to repeat last year’s dominance of this series, they’re going to have to execute at a higher level for 90 minutes than they did in last week’s tale of two halves in Orlando.