The stretcher is coming on to take him off. Hopefully he will be okay.
In the meantime, here is the third goal:
It is the Australian skipper Knowles who is on the ground. Awkward collision seems to have hurt his neck as his head made contact with the Indian players hip. The safety brace is out to take him offf the field.
Hopefully this injury is not as bad as it looks.
The medics are being very careful to move him gently.
Mark Knowles has been placed on the stretcher. The mini-cart is coming on to take him off the field.
Here is the fourth and to this point final Australian goal:
Three minutes to go in the first half and it's still 4-0 to Australia. The game has considerably slowed down.
34 mins: India make some headway down the right but can't find the final ball into the D.
Manpreet finally smashes into the D from the left. It takes a deflection off an Australian stick and goes out of play.
Australia eventually recover the ball and the horn blows.
Australia have been relentless but the loss of captain Mark Knowles has cast a dark cloud on this match.
India just haven't been able to get moving offensively and defensively have been undone by Australia's smart work from penalty corners.
How will India respond in the second-half? What can coach Terry Walsh say in this situation?
36 mins: Australia start in similar fashion this half, breaking into the Indian D. The ball goes out of play and a penalty corner is given for Australia. India ask for a video review.
The ball has come off the stick and it is a long corner instead.
Good use of the video referral.
The long corner comes to nothing for Australia and India breathe again.
37 mins: India penetrate down the right. Gurbaj does well to break into the D down the baseline. The ball eventually goes from right to left and India try and attack again from the left and the whistle is blown. India gets a free hit from outside the D.
38 mins: India working the ball around but eventually lose it and Australia come forward again. India able to intercept at the top of the D though. They promptly give the ball back, however.
Australia seem to be playing at slower tempo in this half.
India having more possession as a result.
41 mins: India have a free hit on the right outside the D but Australia intercept and break at pace to earn a short corner. The ball is flashed across the D but there is no Australia player on hand to deflect it.
43 mins: Australia swarm forward again and win a Penalty Corner after the ball strikes an Indian foot. India ask for the video referral.
Replays show the ball strikes the Indian player on the knee and India loses their referral
Australia has four waiting.
Rupinder managers to deflect it out of play. Australia fails to score from a PC for the first time in this game. They still have the ball though.
Australia push the ball back reset. The ball eventually finds Dwyer on the right but Manpreet gets a stick in the way and the ball is deflected over the bar.
Australia come again and Sreejesh ends up spread-eagled on the ground and looks like he might have pulled a muscle.
He is getting medical treatment now.
Here is Mandeep's deflected shot:
45 mins: SAVE! How did Sreejesh stop this? Australia play a one-two down the right but Sreejesh is alert and rushes off his line to smother the shot. If only he had the same quality of players in front of him.
46 mins: India break quickly and Yuvraj gets off a reverse-snap shot inside the Aussie D but it is blocked. India showing some signs of live on the offensive end though.
48 mins: India come forward again. Possession has been less unequal in this half so far.
India already have more circle penetrations in this half - four - than they did in the entire first half (3).
India squander a great opportunity as Sardar Singh bursts into the box but the pass is late and behind him and Australia regroup.
50 mins: SAVE! Another good save from Sreejesh. Gets his right glove in the way of a snap shot but India end up conceding another penalty corner.
SAVE! Sreejesh does it AGAIN! Dives full length and gets his stick in the way of the low shot that was streaking into the right corner. He has been fantastic all through this tournament.
Play held up again as Govers falls to the ground now.
53 mins: Australia working the ball around again looking for their fifth goal. India win the ball back though and push forward down the left.
54 mins: Rupinder break into the Aussie D down the left but the whistle blows for a free hit and Hammond eventually clears.