(Image source from: Phillip Hughes remains on life support})

Phillip Hughes has undergone surgery and in an induced coma in intensive care after being knocked out by a bouncer while batting for South Australia in a Sheffield Shield match against New South Wales at the SCG.

After Undergoing emergency brain surgery, the outcome of the operation expected to be known in the next 24 to 48 hours.

The South Australian batsman was struck just below the helmet on the back of the head by a bouncer from NSW quick Sean Abbott when he was on 63 during the Sheffield Shield clash against NSW.

Paramedics performed mouth to mouth resuscitation on Hughes and treated him on the SCG boundary for around 40 minutes after he was taken from the field on a medicab with close friend David Warner alongside him.

A medical helicopter landed at the SCG to allow expert medical staff to assist Hughes.

Hughes's mother and sister were at the ground and travelled to the hospital to be with him and he went into surgery after scans to determine the extent of his injury.

South Australian Cricket Association (SACA) high-performance manager Tim Nielsen accompanied them to the hospital and spoke on behalf of the family.

"The outcome of that surgery is unlikely to be known in the next 24 to 48 hours," said Nielsen, who previously coached Hughes in the Australian Test side.

AW: Arun Kumar