Complex sentence: On 13 December, Čop scored his first goal for the "Boquerones", an 87th-minute winner in a 2--1 victory at Rayo Vallecano; on the same day, he threatened to leave if his playing time would not increase.
Split into simpler sentences: On 13 December, Čop scored his first goal for the "Boquerones", an 87th-minute winner in a 2--1 victory at Rayo Vallecano. On the same day, he threatened to leave if his playing time would not increase.