Complex sentence: His old fans had been shouting offensive chants at Adebayor throughout the match, and when he scored a header in the second-half, he ran the length of the pitch and slid on his knees in front of his old supporters.
Split into simpler sentences: His old fans had been shouting offensive chants at Adebayor throughout the match. And when he scored a header in the 2nd half he ran the length of the pitch and slid on his knees in front of his old supporters.