A review of Bruno Fernandes' alleged punch at James Ward-Prowse absolved the Manchester United star of any wrongdoing.
While social media footage of a tangle between the duo appeared to show the midfielder lashed out at the Southampton captain, other angles of the incident showed Fernandes was merely trying to free his arm.
Saints fans were incensed when a video emerged on Twitter shortly after their side's 1-1 draw with United at Old Trafford.