Both took to Twitter in celebration after Berahino scored West Brom's winner against the Saints, an important goal which secured an equally important result.
The Baggies are now up to 13th in the Premier League table, a full eight points above the relegation zone.
And defender Lescott congratulated young Berahino after his goal against Southampton, also looking ahead to a 'massive week.'
Great result today, top finish by @SBerahino massive week ahead now, good recovery is a must.— Joleon Lescott (@JoleonLescott) February 28, 2015
The week ahead is so important for West Brom because it involves two consecutive visits to Villa Park. In a rather strange situation, the Baggies travel to Aston Villa on Tuesday night for Premier League action. They then do the same on Saturday for the FA Cup quarter-final.
Both clashes are huge. Aston Villa are 19th in the standings and a win over their local rivals could mean big things when it comes to West Brom's survival chances. The cup clash, meanwhile, speaks for itself.
While West Brom beat Southampton at home on Saturday afternoon, Aston Villa lost 1-0 at Newcastle United.