Preston boss Frankie McAvoy admitted his half-time tactical tinkering against Hull City cost his side dear.
North End made a flying start, with Emil Ris Jakobsen putting the hosts in front. But City drew level before the break, prompting McAvoy to make some changes at the interval that backfired.
He said: “The reason we changed it at half-time was because we had five dealing with a three.
“We decided to have a go and go back to looking at the diamond which we have worked on.”
Hull ran riot in the second half. Richie Smallwood’s deflected effort put McCann’s team ahead. and City never looked back from that point, with Josh Magennis and Andy Cannon adding the third and fourth goals respectively.
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“We started really positively in the second half and we had two great chances to score,” said McAvoy.
“Then we got caught by their second goal, there was probably a bit of fortune for Hull with it getting a deflection to take it past Daniel Iversen. But the third and fourth goals was poor, poor defending from us. We looked really fragile in a back four scenario.
“The bit we really need to look at is that although we probably looked a bit better going forward, we looked fragile defensively as a back four.”