Agree, but I wouldn't judge yesterday on that . As I said it was a typical 10 man defensive performance, tight in the middle at the expense of wide areas.
There was only 3 more crosses from the right over the left simply because we were attacked more down that side.
The stats you posted, whilst interesting, doesn't show the quality of defending.
On that criteria if a team attacked ONLY down the left, it wouldn't mean that the defenders on the opposite side defended better because they let zero crosses into the box.
IMO it is similar to the Trippier debate, if more attacks came down his side then it stands to reason the opposition would have more chances from there. It doesn't mean Trippier is/was shite very week.
They support the notion that we don't defend the flanks great. Southampton don't really have 10's that are going to cut you open through the centre, they have Boufal and Redmond who are wide attacking players. I watched Sissoko stand off way too much and allow players to jink right and cross, and him and Eriksen just weren't diligent enough.
I don't know why he didn't take Eriksen off when he put Dier on and shuffle Winks out right of the CM4.
But this isn't a unique issue, Sissoko, contrary to mythology, does not protect his RB well when playing RM, especially in the CM2, he doesn't read the game and he ambles about. Go and read what Five wrote in the ratings thread for the Leicester game.