My bad for my google search skills. But lets deal with real facts regarding Diallo, he is being managed very well by a bunch of professional people at United. You don't like it, then tough. When you prove yourself I'm sure they'd be more than willing to employ you and your expertise in that area.
Throwing him in at the deep end against Arsenal away doesn't appear very logical from what I've seen when big clubs sign young players. Ronaldo has proven as a generational talent, Diallo is highly rated, there is a big big difference between and I'm pretty sure Ole and co know where he's at and what he should be doing. You're fully entitled to your opinion, but don't forget, he's not Ronaldo or Rooney nor Martial, he's physically very different to all of them at the same age and has far far less first team experience than any of them.