|12||West Bromwich Albion||4||-1||4|
|17||West Ham United||4||-4||3|
Goals from Alexis Sanchez, Theo Walcott and Mesut Ozil put the Gunners 3-0 up inside 40 minutes.
"We've always worked on corners," Mata said. "We tried it last season but it didn't work. Now we know we have strong people to head the ball in."
Mesut Ozil ensured one Arsenal fan had a day he would never forget after the victory over Chelsea.
Arsenal recorded an overdue win over Chelsea on Saturday, but Didier Drogba wasn't about to let Theo Walcott get carried away...
The Gunners scored three goals inside the game's opening 40 minutes as they recorded their first victory over their London rivals since 2011.
Arsenal enjoyed a rare win over Chelsea as their attackers all hit form, with Mesut Ozil, Alex Iwobi and Alexis Sanchez the pick of the bunch.