The key moments from a lively night at St Mary's Stadium, as Southampton were undone by a slick Arsenal performance. Disclaimer: Stuart Armstrong's stunner is still well worth a watch! Subscribe to Southampton's official YouTube channel: http://www.sfcne.ws/YTSubscribe For the latest news from around the club, visit our official website: http://www.southamptonfc.com ➡️ Follow us on Twitter: http://www.twitter.com/southamptonfc ➡️ Like us on Facebook: http://www.facebook.com/southamptonfc ➡️ Follow us on Instagram: http://www.instagram.com/southamptonfc