The Baggies got the better of Arsenal 3-1 at home in the Premier League on Saturday afternoon.
Hal Robson-Kanu made it 2-1 to the home team just 10 minutes into the second half, and Dawson competed the scoring in the 75th minute.
West Brom goalkeeper Foster has taken to Twitter to give his reaction to the win against Arsenal.
Over the course of The Hawthorns on Saturday afternoon, hosts West Brom had just 23% of the possession, took 12 shots of which eight were on target, and earned four corners, according to BBC Sport.
Visitors Arsenal had 77% of the possession, took 11 shots of which two were on target, and earned five corners, according to BBC Sport.