Arsenal analysis: Raya proves worth with crucial contribution

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.They had been nullified by Sunderland at that point, with attacking metronome Martin Odegaard kept quiet by their former player Granit Xhaka.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.Ko