Ivan - Luiz - JT - Cole Bosingwa at RB against Utd just gives me the creeps. Too immature positionally and too vunerable to lapses in concentration. Ivan, while more solid than spectacular, will do his job and keep their winger in check. Having Sturridge ahead of him makes a difference as well, last season Anelka/Kalou kept straying in midfield and it increased Ivan's workload on the right. Also I'd imagine Ramires will be asked to help out the RB with defending, much like against Bale at WHL last season. In the middle I'd go for Luiz regardless of whether Mikel plays. As much as I rate Alex, he's a little limited in what he brings to the table apart from bread and butter defending. He's been making some mistakes lately (Newcastle late last year, WBA this year) and isn't suited to the high line. His match fitness is a worry anyway. Even though Luiz is very capable of having a rush of blood to the head and ending up doing something silly, he's just as likely to make amends and make a telling contribution at the other end.