The opponents were Shrewsbury in the Carling Cup, and it was only after Chamberlain's powerful 58th-minute strike that Gooners across the globe could heave a sigh of relief. He had an excellent all-round game, and looked by far the most accomplished player on the park.
The young Portsmouth-born winger, who only turned 18 in August, has made a rapid rise to stardom. He joined Southampton at the age of seven, and broke into the first team towards the end of the 2009-10 season.
However, he established himself as a regular during the following season, making a total of 41 appearances across all competitions, scoring 10 goals and providing eight assists.
More than the stats, though, it was the overall quality, speed, maturity and flair he displayed that set pulses racing, and soon enough, Premier League clubs came calling. He joined Arsenal on August 8, 2011, and made an instant impact in a man-of-the-match display on his first start for the club against Shrewsbury.
In his brief career thus far, Chamberlain has put together enough highlights to fill a DVD. Here are some of his most exciting moments for Southampton, Arsenal and England under-21.