Complex sentence: Four days after signing Borjan made his club debut in the Champions League in a 2-1 away defeat to Liverpool, this was the first time that a Canadian international played in the group stage of the competition since Lars Hirschfeld played with Rosenborg in 2007.
Split into simpler sentences: Four days after signing Borjan made his club debut in the Champions League in a 2-1 away defeat to Liverpool. This was the first time that a Canadian international played in the group stage of the competition since Lars Hirschfeld played with Rosenborg in 2007.