We really shouldn't need another two CBs if he'd spent the cash wisely last summer.
I confess I wanted Williams too, but Koeman gets paid a lot of money to get these decisions right and he hasn't worked out.
We cant operate with both Williams AND Baines in the backline as it means we are hanging back and not getting up the pitch pressing as a unit...which is presumably what this manager wants.
I absolutely agree however I'd say the solution isn't to discard Baines and Williams, instead we should be looking to bring in a top dog CB to go next to Williams. Don't forget mate, this is a Euro semi-finalist - not to be sniffed at.
We get a lightning fast CB in next to him who doesn't have the positional sense as a beagle puppy (Funes Mori) and we have a back four that should be able to cope with everything within reason.
To me, and i'd never profess to knowing more than Koeman, we should have gone 3-5-2 against Spurs. That would have allowed Baines to have an advanced starting position to try and negate against Walker at source. If Baines was ever beaten in a foot race - not a stick to beat him with given Walker is lightning fast - we would have had a further hurdle for him with the left sided CB coming out to stop him.
Instead we flooded the centre of the park to accomodate Barry who, as much as I love him, is never the man to play vs Spurs with Alli / Dembele / Kane / Eriksson all buzzing around him.