It was reported in the Daily telegraph about United wanting to sign two midfielders before the completion of the Casemiro transfer.
I honestly believe it's very important we sign a midfielder who will act as the roaming play-maker both in a deeper role as the #6 and also as the #8 whilst advancing with the play. We don't have a player with that profile and we shouldn't rely on Eriksen to fill that role over the course of the season. I can't reiterate enough how important this player can be for us, especially in possession.
The likes of Caqueret, Vitinha, Bennacer etc were my choices. Vitinha has since gone to PSG and Caqueret might be difficult to prise away from Lyon due to signing a new contract recently. Bennacer might be a possibility but there's question marks about his fitness in recent years so he'd be a bit of a risk, eventhough. I like him as a player.
The club could also look to sign someone like Tielemans for now due to his contract situation and develop one of several young players (Hannibal, Iqbal, Mainoo) to fulfil the role in the next few years. The aforementioned youngsters are of the profile that could be developed in that #6/#8 hybrid role that we're missing right now. I'm not a big fan of Tielemans, but i'd take him for a reasonable price to play in a midfield with Casemiro and Eriksen for now.