Australia's golden girls doubled our gold medal tally this morning with Anna Meares and Sally Pearson blitzing all comers in two nail biting finals.

The home crowd erupted as Great Britain's Victoria Pendleton finished the first women's Sprint Final 0.001 of a second ahead of Australia's Anna Meares.

Then there was stunned silence as Pendleton was relegated to second when officials ruled she had exited her sprinting lane.

In the second race it was like Adelaide's own 007 tossed Great Britain's cycling Queen from the chopper, as Anna demolished a disheartened Victoria.

Meares won with such a convincing margin that she had time to punch the air in celebration as she crossed the line.

"Victoria's such a hard-fought opponent and she's dominated the sport for so long," Anna said as she paid tribute to her greatest rival.

Pendleton would finish her incredible cycling career with an Olympic gold and silver.

"It's been such a difficult challenge and to be able to win the Olympic title for me, it's so special," Meares said.

On the athletics track, Australia's Sally Pearson cruised through her semifinals to record a time of 12.39 seconds.

As the rain fell in the London Athletics Stadium for the final, Pearson beat USA hurdler Dawn Harper in a photo finish by just 0.02 seconds, setting a new Olympic record at 12.35 seconds and winning Olympic gold.

Australia's medal tally:



Gold: 4 Silver: 12: Bronze: 9 Total: 25

South Australians on Day 11

Cycling - Shane Perkins opened Australia's medal hopes at the Velodrome with the Men's Keirin but was bundled out of the first round after being boxed in on the race to the line.

Perkins finished third in the repechage to qualify for the final, and crossed fifth in the medal-deciding race.

Adelaide's Annette Edmondson was next on the track, with three events to complete the debut women's Omnium.

Edmondson finished fourth in the 3km Individual Pursuit, first in the 10km Scratch Race and second in the 500m Time Trial to win a bronze medal in the overall results.

Middlemount-born Adelaide-based sprinter Anna Meares then took to the track in what was to be one of the greatest Olympic cycling showdowns, against retiring British champion Victoria Pendleton.

Pendleton crossed the line 0.001 seconds ahead of Meares in the first final, but was relegated to second for crossing out of the sprint lane.

Anna exploded in the second final to power past the hometown favourite and claim Olympic gold.

Basketball - The Australian Opals were too strong for China in the women's basketball quarter finals 75-60.

Abby Bishop scored 9 points and 3 rebounds in her 10:07 of court time, Jenni Screen registered 4 points and 3 rebounds in 18:54, with Laura Hodges (Sommerton) not in play.

South Australian's in action tonight and tomorrow morning

Thursday, 12:10am - Sam Willoughby, Brian Kirkham - BMX - Seeding run

Friday, 6:45am - Brad Newely - Basketball - Men's quarter final two (v USA)