There have been some names lined up to fill LB of manchester united. As far as i know if manchester united has not yet decided which player that's gonna be buying by united. We are very close to the september. It pushes ten hag to take final decision as soon as possible. Pierre's price has been inflated, and it's hard for united to buy him at this moment. I think that taking cucurela from chelsea is far better rather than buying a permanent transfer at this moment. It's caused by united needs to find new LB as soon as possible before the end of transfer season. It's not possible to be realized due to the financial problem that happens with united. United prefers to take new player as a loan instead of buying the new player as permanent transfer. It's not possible to get alonso as a loan from barcelona.
Barcelona is still using marcos on its main squad. It is possible to acquire either Pierre or Cucurela, but I believe Cucurela would be the superior option, as MU could secure him on loan.