Bolt admits he is lacking match fitness

The Jamaican superstar, a huge Manchester United fan, has been handed a chance to train with the A-League side for an indefinite period in a bid to prove he has what it takes to earn a professional playing contract.

His arrival has generated a massive buzz at the club's base in Gosford, 75 kilometres (47 miles) north of Sydney, and some 10,000 people packed the Central Coast Stadium -- a virtually unprecedented turnout for a pre-season game.

It wasn't quite Old Trafford but there was a lively atmosphere with a brass band on hand to get the crowd going.

"It's a wonderful moment to play at a high level, in professional football," Bolt said after the Mariners beat an amateur side 6-1.

"It was good, it was what I expected. The crowd gave me a big ovation which I really appreciated. I was a little bit nervous but as soon as I got on the field the nerves went."

After only a handful of training sessions since arriving last week, the fastest man on earth watched avidly from the bench as the Mariners began dismantling the Central Coast select side.

He didn't have long to wait to celebrate with his team getting on the scoresheet barely 20 seconds after kick off thanks to a sweet strike by Jack Clisby from the edge of the box.

They were 5-0 up at a half-time and a massacre seemed imminent, but the part-timers battled hard in the second half.

The eight-time Olympic champion wore gloves and appeared relaxed, despite his nerves, as he followed the match intently.

On a chilly night, he stayed warm on the sidelines by stretching and jogging with the 32-year-old happily giving the thumbs up and high-fives to fans.

Wearing the number 95 shirt in a nod to his 100m world record time, he finally made his entrance after 71 minutes to huge cheers from the crowd and fireworks.

Starting on the left wing, he fluffed his first touch, making a run on the inside only for the through ball to hit him on the heel.

He got himself in the box soon after but a cross whipped in from the left went over his head.

Playing more centrally he didn't getting much of a look in, jumping for another cross that again sailed high.

His best touch came 10 minutes after coming on when he controlled a bobbling ball with his right foot, rode a challenge and laid it off with his left foot.

Before the game Bolt admitted he was not match fit and pouring with sweat he tired quickly before a late flurry, narrowly failing to get on the end of a low cross after a sprint into the box, and then having a shot blocked.

"I wish I had more touches but I'm not fit yet," he said. "I've just got to put in the work, get up to speed and I'm looking forward to a great season."

Bolt, who retired from athletics last year, has previously tried out with clubs in Germany, South Africa and Norway to no avail, with the Mariners hoping to turn him into A-League material for when the season starts in late October.

Former Australian international Robbie Slater, who was watching the game, said he still had plenty of work to do.

"He was short of a gallop when it comes to match fitness," he said.

"He made some nice little runs, but obviously he needs to learn some more about when he should make the runs and where. He should also have more confidence to go and get the ball.

"But look, it's a special moment for him."