Ross Stewart scored two penalties as Sunderland got their League One promotion push back on track with an emphatic victory over second-placed Wigan.
The visitors were in front with only a minute on the clock, when Alex Pritchard's free-kick from the right wing was headed home by an unmarked Bailey Wright.
Stewart doubled their lead seven minutes before the break from the penalty spot, after the former Ross County striker had been tripped just inside the box by Curtis Tilt.
Stewart and Pritchard came close to making it 3-0 as the visitors - seeking a double following their 2-1 opening-day win at the Stadium of Light - enjoyed almost total dominance.