Champions League side Schalke 04 continued its erratic run of form .
Champions League side Schalke 04 slumped to a 2 - 0 loss at Freiburg to drop to 11th on 14 .
Champions League side Schalke 04 continued its erratic run of form and slumped to a 2 - 0 loss at Freiburg to drop to 11th on 14 .