Alexander Isak started making repayments on his British transfer record fee with his first goal for Liverpool but it required a late effort from centre-forward rival Hugo Ekitike to beat Southampton 2-1 in the Carabao Cup.
However, the young Frenchman's insistence in over-celebrating by removing his shirt to show his name on the back to the cameras was a costly mistake as, having already been booked, he was subsequently sent off.
His pending suspension means Isak will almost certainly start at Crystal Palace on Saturday, although that may have been head coach Arne Slot's plan anyway as he continues to build up his fitness.