A man in a purple jersey is falling down while chasing a player in a green jersey playing soccer
The two soccer players run around chasing each other
"A man in a purple jersey is falling down while chasing a player in a green jersey playing soccer" is a rephrase of "The two soccer players run around chasing each other."
The man falling was a part of the two soccer players chasing each other.
A man in a purple jersey is falling down while chasing a player in a green jersey playing soccer means there are two soccer players running around chasing each other.