The Baggies failed to return to winning ways in the Premier League on Saturday afternoon, as they went down 1-0 to Watford at home.
Ben Watson’s goal in the 27th minute proved to be the difference between the two sides at The Hawthorns.
West Brom would have picked up all three points from the encounter, had Berahino been able to convert his two second-half penalties.
The 22-year-old striker has taken responsibility for his failings on Twitter, while West Brom goalkeeper Ben Foster has sent a message to the Watford fans on the social networking site, having been on loan at the Hornets from Manchester United in 2005-06 and 2006-07.
Absolutely gutted, hold my hand up for the defeat today. #ontothenextone— Saido Berahino (@SBerahino) April 16, 2016
And thanks to the @WatfordFC fans for the nice reception, you'll always mean a lot to me.— Ben Foster (@BenFoster) April 16, 2016
Over the course of the 90 minutes at The Hawthorns on Saturday afternoon, hosts West Brom had 57% of the possession, took 16 shots of which only four were on target, and earned nine corners.
Visitors Watford had 43% of the possession, took 11 shots of which four were on target, and earned three corners.