Complex sentence: Thereafter, they played an entertaining round of 16 game against the United States, in which American goalkeeper Tim Howard made 15 saves however, they defeated the US 2--1 in extra time.
Split into simpler sentences: Thereafter, they played an entertaining round of 16 game against the United States, in which American goalkeeper Tim Howard made 15 saves. However, they defeated the US 2--1 in extra time.