Nasty.

Wales and Fiji are currently battling it out in an absolute belter of a game in Pool D at the Rugby World Cup in Japan.

Josh Adams has just given Wales the lead (22-17) with a simply stunning finish in the corner after a lovely offload from Jonathan Davies, at the time of writing.

But just minutes ago there were some very worrying scenes as Dan Biggar collided with teammate Liam Williams in the air, knocking the Wales outhalf unconscious from what we can see.

It’s the second time Biggar has been forced off already at this World Cup over a bang to the head and casts some serious doubts over his future at the World Cup. Have a look below. Let’s just hope he is ok.