Maguire's opportunities have been hampered somewhat by injuries since his January switch from Waterford United. The 18-year-old joined the fray with quarter-of-an-hour to play and but for a stunning stop, would have been celebrating the winner.
Haycock told whufc.com: "Maguire came on and I was pleased with him. He looked lively. I asked him to get in behind, to run in the box and the keeper has made a world class save. In training he looks like a sharp finisher.
"Hopefully now, we can get on the training field and get some more work into him. He's had an injury and he has only just joined our programme, while the other boys have been on the programme all year. So it will take him time to come up to speed but he did himself no harm whatsoever when he came on."