The former Bolton boss ended his five-and-a-half-month tenure at the DW Stadium after Sunday's 3-1 home defeat to Derby County in the Championship but Whelan was quick to point out that he had not been sacked by from his post.
"Things happen fairly quickly in football and we have lost three home games in a row," he said in the wake of the Derby loss which came after Thursday's Europa League defeat to Zulte-Waregem and the November 23 reverse to Brighton & Hove Albion.
"I didn't sack Owen. I had a meeting with him after the game and I told I was disappointed in the performance of the team and in his team selection.
"Owen said did I want him to resign and I said 'yes, if you'll resign we will obviously have to pay compensation' but I accepted his word and he has resigned.
"I was disappointed with our performance yesterday and with our two previous home performances. The crowd were getting on at him yesterday and they did at the last two home games."
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