Sunderland lost 4-2 away at Southampton in the Championship on Saturday. Sunderland headed down to the south coast to face Southampton in the Championship on Saturday afternoon. The Black Cats were looking to avoid a sixth-straight defeat in the Championship, but would find themselves two goals down before half-time at St Mary’s. Stuart Armstrong capitalised on some poor Sunderland defending to score the first and then Adam Armstrong scored from the spot, after Chris Rigg took down Ryan Manning inside the penalty area. Sunderland mounted a comeback in the second half; Romaine Mundle bagged his…