Guimarães and Saka fire Arsenal to win at Sunderland after Raya spot-kick save

As the final whistle blew Bruno Guimarães wore a mischievous smile, Enzo Le Fée was a study in dejection and Arsenal’s immaculate start to the season remained unblemished.

Two minutes after David Raya had rather majestically saved Le Fée’s second-half penalty, Guimarães delighted his new north London public and plenty of old friends in Newcastle by sending a shot curving past Robin Roefs from the edge of the area.…