By Braden Chalker It’ll be a battle of two Eastern Conference clubs as Atlanta United and Chicago Fire square off Sunday afternoon at Mercedes-Benz Stadium. Atlanta will be eager to rebound from their 2-0 defeat to Toronto FC last time out, as Gonzalo Pineda’s side played within themselves for the majority of the game. The Five Stripes were looking to cement themselves inside the top four of the Eastern Conference with a win, but the 2018 MLS Cup winners were unable to do so without Thiago Almada and Giorgos Giakoumakis who should be back in line for a return this weekend after the March inter…