The Hornets’ record signing, who had not scored since the opening-day win over Aston Villa, proved too good for the Norwich defence with his brace putting the game beyond the hosts.
Browsing: Sarr
The Hornets, meanwhile, have a dismal away record in London, winning just two of their last 22 league games in the capital and failing to win in each of their last 10.
The Hornets began life back in the big time with an impressive home win against Aston Villa, while the Seagulls secured all three points away at Burnley.