Neither Phillips nor Williams are fast enough to play our high line. Neither is Fabinho but he has the game intelligence and experience to compensate. If Matip is out, I'd probably go with Nat for his aerial ability, and have Hendo ready to remain deep to cover him if he's exposed. Largely the loss of form is just that though - no matter how much we analyse the problem, it's been there since the Everton game and we've coped until recently. We just have to start getting it together again.