van Dijk and Gomez won't play every game. Rotation and injuries will provide enough games for another top centre back.If they are here to play Lcb/LB then they are not starting ahead of VVD and Robertson.
Gomez is our starter at RcB. The incoming player has to be convinced that there will be a chance to dislodge him otherwise again he will be cover. Its not me you or the club have to convince about the importance of cover - its the incoming player who has a firm idea as to where he should be in the pecking order.