Right now Javi must look at the back four and ask himself who are the best defenders. I know it's surprising but I have to say that for me defensively Janmaat is ahead of Kiko and Masina edges Holebas. I believe there is a case for Kiko playing in front of Janmaat as they link up well and Kiko would be free to get forward and provide pace out wide (maybe until Sarr gets going). I know many will disagree about Masina but he is much better than Holebas at heading and stronger in the tackle. Holebas is superior going forward but at the moment the priority is shutting up shop.