Former Premier league referee Chris Foy re that goal on Tuesday.
Foy said: "From the replays, we're able to see, the ball looks to have fully crossed the goal line. However, the judgement for the assistant referee, who is well-positioned, is made more difficult because the attacker and defender are in between him and the ball, undoubtedly obscuring his view.
We also know that cameras that are not directly in line can provide a misleading image in this type of situation; just because grass can be viewed between the line and the bottom of the ball does not necessarily mean the ball is fully out because the curvature of the ball means that the edge of it can be overhanging the line and therefore not fully out."
He does go on though to say he believes the goal shouldn't have stood.