5. Owen Farrell (England)
Eddie Jones’ star man hasn’t really had a chance to showcase his best yet, starting at centre in the opening match against Tonga before playing that position once again as a replacement against the USA. In those two games, he’s missed a combined six tackles. Poor kicking against Argentina followed before he caught a sickness bug and a day of training. Eddie Jones will need him at his best for the quarter-final against the Wallabies.