Remco should worry about roglic before even think in facing pogacar and vingegaard at the grand tours.I'm talking about Pog vs Remco.
For the TdF it depends upon the parcours. On this years course and if Pogi stays at this level, he comfortably has Vingegaard's measure. I still say Pog played into JV and Vingegaard's hands on Granon. I can't see that happening again.
As for Roglic, Pog should ignore him and simply worry about Vingegaard. If Roglic makes time it drives a wedge between Jumbo's two leaders.
There's no rivalry between remco vs pog at the moment.