Goal or No Goal?

[ref2coach]

Originally Posted by Eastshire

Why precisely are you stopping play? At no point does blue touch the ball while the keeper has possession. If you stop play just because the keeper has possession, your only possible restart is a drop ball. We don't stop play just because the keeper has possession. Since we don't stop play for no reason, and since the keeper loses possession without blue touching the ball or the keeper, there is no reason to stop play or disallow the goal.

When may a GK be legally challenged?

Once the GK got one or both hands on the ball he now has possession.

Blue #7's foot contacting the GK left arm when he has one or both hands on the ball is a foul.

Even if you do not see the opponent contacting the GK you still have ATR 12.16 "An opponent who attempts to challenge for a ball in the possession of the goalkeeper may be considered to have committed a direct free kick foul."

Once you see the keeper contact the ball with his hand or hands after the touch by his team mate you now have possession and activity by opponents #7 and/or #19 are illegal challenges to the GK in possession.

The restart will be a DFK for the GK's team.