The match was primarily arranged for Kevin Nolan as he continued his comeback from a shoulder injury.
But Oxford, 15, and the subject of intense speculation linking him with Manchester United, also featured in the defeat.
Haycock told whufc.com: "I think the back three did very well, they haven't played together as a three before. With Reece, it's easy to forget he's only 15 years of age."
For the big stories and the banter follow us on Twitter: @tribalfootball