Arsenal's first-half frustration was encapsulated in manager Mikel Arteta being booked shortly before the break for leaving his technical area too many times. Greece winger Christos Tzolis continued his inconsistent start to the season, more reminiscent here of his toothless showing against Aston Villa rather than the productive display at home to Chelsea. Konsa, even before giving away the penalty, struggled to deal with Sunderland's direct attacking approach and the physicality of striker Brian Brobbey.