At the final whistle Álvaro Arbeloa provided a study in pensiveness while Régis Le Bris simply looked relieved. An almost palpable fear of losing formed the subtext of a match decided when two of the Sunderland manager’s second-half substitutes, Habib Diarra and Wilson Isidor, combined for the latter to score. Isidor’s goal not merely supplied Sunderland with their first win of the season while leaving Arbeloa’s side pointless but ended his club’s 17-year run without a Premier League victory ag…