Sunderland recorded a resounding 3-0 victory, while Brighton were held to a draw by Fulham in their opening Premier League match.
Sunderland crushed West Ham 3-0 at the Stadium of Light, Sunderland, according to Premier League records.
The three goals were scored by Eliezer Mayenda, Daniel Ballard and Wilson Isidor in the second half.
Sunderland temporarily moved up to first place in the Premier League table with three points from one game, while West Ham are bottom.
