Johan Elmander help Bolton Wanderers to take a 3-1 victory over West Ham.
The Hammers missed a golden chance score after 35 minutes when Carlton Cole saw his tame spot-kick saved by Jussi Jääskeläinen after the striker had been fouled by Grétar Steinsson.
Football Highlights: West Bromwich A vs Sunderland West Brom boss Roberto Di Matteo:
"We played some great stuff and created some very good chances.
"I have belief in my players and they gave me exactly what I was looking for. We're happy to have three points."
Tottenham Hotspur win with a 2-1 victory over Stoke City
Spurs were ahead in lucky circumstances in the 19th minute. Peter Crouch's headed and off the line Ryan Shawcross reflect the shot, only for the ball to deflect of Gareth Bale's face and into the net.
Ben Foster saved penalty from helped put Birmingham City on their way to a 2-1 home victory over Blackburn Rovers.
Blues keeper Foster denied Pedersen from the penalty with an impressive save on 50 minutes. The penalty was judged after Nikola Zigic had fouled Chris Samba in the box.
But Blackburn finally took the lead as Steven N'Zonzi diverted home a near-post header from a Pedersen corner on 54 minutes.
The new member of Premiership Blackpool, who won 4-0 at Wigan on the first round of the EPL, started well but Walcott scored in 13 min. and Arsenal goes ahead. Ian Evatt was shown red card for a foul that appeared to be outside the area, Andrey Arshavin scoring the penalty, before Walcott make his second on 39 minutes. Abou Diaby clipped home, Walcott curled in and Marouane Chamakh headed a sixth. This is a first hat-trick for Theo Walcot.