The Daily Express says within minutes of Walcott leaving the pitch in Zagreb, his agent was taking calls from people desperate to take a slice of the new pin-up boy. And Arsenal were quick to react.
His performance will have been noted by Manchester City, Chelsea and Real Madrid, especially as his Gunners contract has little more than 18 months to run. In the summer, Arsenal chiefs told Walcott they would wait until December to start negotiations about a new deal.
But those talks are likely to be moved forward as a matter of urgency.
Having signed as a 16-year-old in 2006 from Southampton, Walcott is well down the pay scale on about £20,000 a week.