First of all, Grimaldo isn’t the most optimal fit for a 4-3-3 system — he’s more comfortable in a 3-5-2 or 3-4-3 setup.
Secondly, I don’t know of any club that can afford to have two players of the same position and of the level of Balde and Grimaldo in the squad.
Totally wrong on the last one.
We need 2 players for each position, most should be close in terms of quality.
Look when Balde got injured for the most important games of the season, Flick was forced to play MArtin.
That should not happen again
Besides, they complement each other: Grimaldo is perfect for low blocks and buses, Balde is for the opponents that press