Ndombele is one midfielder I like alot in that team,his work rate is 100 percent and stands as an anchor in the heart of Tottenham's midfield.Morinho was in search of a defensive midfielder and really wanted to get Arsenal midfielder Granit Xhaka,but due to the delay,the deal couldn't materialise.
But it seems he has set sight on Ndombele to perfectly fill that space.It will be a good move for Ndombele as well,because if he is performing well in the best league in the world,then he will certainly do well at another league.
Get proper research pal, Ndombele is a central midfielder not a defensive midfielder.
Granite Xhaka is the full breed of a defensive midfielder...I don't see he's movement over the other side, maybe he could be moved due to more use of Thomas Partey regularly....less playing time frustrates players and drops their form...he had(Ndombele) a good time under Jose Mourinho.
I would assume that you could make Ndombele play at defensive midfield if you could convince him. Even on transfermarkt it says that he is a midfield but his "side-position" is defensive midfield so I assume that he could be played there if given the requirement. However if you could get a player like Ndombele to a team like Roma, I would assume that no matter where he wants to play then you would just let him play there because he would be a great improvement for them.
Right now on transfermarkt, no player Roma has is 50 million euro in value and Ndombele is valued at that, so he would be the most valued player in that team. Aside from that their midfield is not that amazing, they are playing Cristante and so forth, I would assume that it would definitely be a huuuge improvement for them.