Modren game of high press, high line, leads to more one-on-one situations. Full backs can help, but limited. Trip and Davies average pace too. As I said Toby, Vert are still good and can handle most teams. Against City, Liverpool we will struggle. If we are aiming for title we will have to match them.
a) Where does both teams pace lie?
b) Where areas do both teams typically breach an oppo back line from?
c) When's the last time our CBs were done for pace against either side?
d) Of the best 20 or so CBs in the world, how many of them have an overt amount of pace?
Although this has spiralled, my original point was that Jan & Toby are able to compensate (like any top CB should be able to) for any alleged lack of pace... Intelligence and reading of the game should suffice.