The Breakdown: Southampton (h)

Santi Cazorla's last-gasp penalty secured a priceless win against Southampton on Saturday after a tense match at Emirates Stadium.

In our latest episode of The Breakdown, Adrian Clarke analyses how we won the game and also examines:

• The debut displays of new boys Lucas Perez and Shkodran Mustafi
• Laurent Koscielny's performance
• Santi Cazorla's influential role
• The late penalty decision

Click the 'Play' button above to watch the show, and don't forget to check these out:

• Match video: Arsenal v Southampton
• Santi on his penalty and Koscielny
• Pictures: Arsenal v Southampton
• Cech - My own goal and our response