Cole ripped into his old team, claiming they had 'no answers' for the superior energy and enthusiasm of the Saints.
As part of BT Sport's coverage, Cole said: "They had no answers. Southampton's energy was outstanding, so many players outstanding.
"Thomas Tuchel has a lot of questions to answer, there will be a lot of comings and goings before Thursday but it was as poor a performance as I've seen under Tuchel.
"I can't remember a chance in the second half. A very disappointing night."