I agree with OB..s point that from a still photo we cannot decide.
However it is worth bearing in mind that Green is perfectly entitled to continue running his line. It seems Red is trying to go wide in support of the ball carrier, Green has no obligation to get out of his way. not that I am aware of anyway. Red on the other hand cannot push him out of the way, since it is against the LoTG to push an opponent off the ball
[laws]10.1 Obstruction
(a) Charging or pushing. When a player and an opponent are running for the ball, either player must not charge or push the other except shoulder-to-shoulder.
Sanction: Penalty kick[/laws]the depth of field can be deceptive, but if an attacker was to obstruct a would be tackler, you could disallow the try and come back for penalty to Green. Right?