Arsenal swept aside Bournemouth to continue their perfect start and rise to the top of the Premier League table.
After the break, William Saliba curled home a beautiful third before Gabriel Jesus saw his clever finish ruled out by VAR for offside.
It is the first time Arsenal have won their opening three fixtures since the 2004-05 season.
Bournemouth had won their first home game back in the Premier League against Aston Villa and there was a rousing feel to this Saturday teatime kick-off at the division's smallest ground.
It took a mere five minutes for that feeling to be punctured as Odegaard tapped in after Bournemouth keeper Mark Travers had saved Gabriel Martinelli's low strike.