SUNDERLAND :Sunderland manager Regis Le Bris says his side will need to produce a masterclass if they are to halt Premier League leaders Arsenal's momentum on Saturday. Promoted Sunderland have been the surprise package of the season so far with 18 points to show from their opening 10 games of their first top-flight season since 2016-17. But the visit of an Arsenal side seeking to open a nine-point gap at the top will be their toughest test yet after a relatively kind set of opening fixtures. "