West Ham United have sold the Norwegian, so why didn't they keep the youngster rather than sending him out on loan?
West Ham United have been quick to seal deals - both permanent and temporary - for departing players this summer, but one raises questions over the other.
The 18-year-old may be a centre-back by trade, yet he is more than capable in a holding midfield role, and giving him chances in the centre of the park would have allowed him to develop his game, stepping into the heart of West Ham's defence if and when required.
Even more bizarre is West Ham's decision to play Nordtveit at right-back on occasions last season, a position Oxford can also occupy without looking anywhere near as lost as the much-maligned Norwegian did.
A move to the Bundesliga should allow Oxford to play week in, week out in his preferred position, allowing him to develop before returning to the London Stadium as the finished article.
However, one wonders if he could not have got plenty of chances at his parent club if only his manager was brave enough.
Slaven Bilic was picked Oxford away to Arsenal when he was only 16, and he was rewarded with a performance that belied his age and spoke of outstanding things to come.
Two years later, he is further away from a regular starting spot at West Ham and will not be able to train alongside his teammates for the next year.
Nordtveit's exit made sense, despite some better performances over the second half of the campaign. It is just a shame Oxford is not around to take advantage of a potential gap in the squad.