Complex sentence: He would make his international debut against Azerbaijan, on 13 October; in the finals' group stage, he appeared in the 2--0 loss against Switzerland on 16 June 2008, a game in which nine out of eleven regular team starters were rested.
Split into simpler sentences: He would make his international debut against Azerbaijan, on 13 October. In the tournament finals' group stage, Veloso appeared in the 2--0 loss against Switzerland on 16 June 2008, a game in which nine out of eleven regular team starters were rested.