The attacking midfielder was recommended to Ferguson by his assistant Carlos Queiroz. Ferguson has yet to decide whether to offer Tevez Jnr a permanent deal and it is understood the teenager has been home-sick during his stay in England.
But sources close to United said Ferguson was impressed by his ability and attitude and has told his staff that his development must be monitored.
Miguel also spent time at West Ham when Tevez was there last season and is considered one of South America's most improved young players.
He is known as the 'little Apache' at home and began his career at Boca Juniors, where his brother made his name.