After travelling to Sydney's outer south-western suburbs to see friends from his homeland perform at a country music night, he was the victim of a savage, five-minute attack by two allegedly drunk teenagers wielding metal bars.

The man, who has asked not to be named, was described yesterday as a ''…wonderful, kind, generous individual'' by his girlfriend, Kristin Sharrock, from Mosman.

''He's been through a lot in his life and he doesn't deserve what's happened,'' she said.

The 35-year-old is no stranger to bad luck. In 2000, he broke his back after crashing a snowmobile near his home in north-western Canada. A month later, his 49-year-old stepfather was killed in another snowmobile accident.

He met Ms Sharrock at a Pearl Jam concert last year. They fell in love and in November he flew to Australia to spend time with her.

His luck turned again just after 11pm on Tuesday at Mount Druitt train station.

After watching his friends perform at the Rooty Hill RSL, he allegedly ran into the two teenagers, one aged 16 and the other aged between 12 and 15. The pair abused him and followed him along the platform.

What followed was described by Mount Druitt Local Area Commander Superintendent Wayne Cox as a ''calculated assault'' and ''one of the most serious attacks I've seen''.

The Canadian fled to a lift for safety, but his assailants caught up with him. They allegedly stomped on him and struck his head and body with a pole and a piece of the wheelchair.

They tried to steal the wheelchair and scattered coins suggested the youths had also tried to take his wallet.

A horrified station worker called police and a 16-year-old was arrested. He faced Parramatta Children's Court yesterday, charged with robbery and grievous bodily harm offences.

Another boy was arrested about 7pm yesterday.

The 15-year-old was also charged with robbery and grievous bodily harm offences.

He was refused bail and is due to appear at Parramatta Children’s Court today.

The Canadian man was in a stable condition in Westmead Hospital today, after undergoing surgery for severe cuts to his head and a depression to his skull.

with Nick Ralston and Dylan Welch

SMH