True, but here's the rub.
When Toby and Jan were the imperious duo they played in conditions that Foyth and Sanchez has rarely had the benefit of, if at all.
Toby and Jan played in a settled back line. They played in a back four with set positions, World class fullbacks and top class defensive midfielders.
Look at Toby and Jan without the fullbacks and defensive midfielders, they look utterly shambolic.
If we are looking for comparisions of whether Dav and Juan can replace Toby and Jan, lets see them try to do it in the same circumstances Toby and Jan became so legendary.