Celtic rounded off their pre-season tour of the United States in style with a thumping 4-1 victory over Chelsea in Indiana. On a day when the Bhoys consistently penetrated Enzo Maresca’s high line, Matt O’Riley, Kyogo Furuhashi, Luis Palma and Mikey Johnston made sure of a confidence-boosting triumph that Christopher Nkunku’s late consolation couldn’t bitter. Facing Premier League opposition always comes with an added edge for Celtic. Not only is there a cross-border aspect to consider, but these matches are also a chance to show the Bhoys can compete against the elite riches of the English to…