At first glance, there are very few aspects that seem to favour Wales ahead of their quarterfinal clash with Belgium. They will be facing a glittering collection of Premier League stars who appear to have hit their stride having scored a combined eight goals in three straight wins. Wales, who rely heavily on Gareth Bale and Aaron Ramsey, were certainly less convincing in their last match, where they needed an own goal to scrape past Northern Ireland in the round of 16. However, there is one factor that might worry Belgium coach Marc Wilmots, and that is the Welsh formation.