Complex sentence: He scored the opening goal in Roma's 2--1 victory over Manchester United in the first leg of the 2007 Champions League quarter finals, but was injured in the warm up of the second leg, and was ruled out of the match.
Split into simpler sentences: He scored the opening goal in Roma's 2--1 victory over Manchester United in the first leg of the 2007 Champions League quarter-finals. However, he was injured in the warm-ups of the second leg and was ruled out of the match.