LONDON –  In the highlight of last night’s session, Caster Semenya finally shrugged off concerns over her readiness for the showpiece event when she cruised into tomorrow evening's final having taken her place in the second of last night’s semifinals.

The former world champion – who had to cede her crown to Russia’s Mariya Savinova at last year’s World Championships in Daegu – produced her best race of the season as she dominated her field winning in a time of 1:57.67 to ensure her progression.

The two lap specialist opted to sit just off the pace for the first circuit, making her move as they came off the penultimate bend moving up to challenge. Heading into the final turn, Semenya was in complete control as she led proceedings before kicking away inside the final 50 metres to send a warning to her rivals.

“I think the time I ran makes me very confident. You have to think about your own race, you have to think of yourself,” said Semenya afterwards.

There was disappointment for medal hopeful, Sunette Viljoen in the women’s javelin as she was forced to settle for fourth place in last night’s final. Coming into the competition the Rustenburg-based thrower had been ranked the world No 1 in the event with a 69.35 thrown in New York earlier this year.

Viljoen’s first effort of 64.53m was good enough for her to sit among the medal’s for a few rounds of the competition before Germany's Linda Stahl produced an effort of 64.91m to break South African hearts. The gold medal went to the Czech Republic’s Barbora Spotakova with a throw of 69.55m while Germanya’s Christina Obergfoll took silver with her effort of 65.16m.

The Olympics came to a close for young sprinter Anaso Jobodwana and although he finished last  in the final of the men’s 200m to say that ending in what will no doubt be considered the greatest sprint race in athletics history as Usain Bolt ran himself into the record books with his victory and second gold medal of this year’s event.

“I didn’t run a  good race,” said Jobodwana who clocked 20.69.  “But running against those guys is like a totally different story from the semifinals. It's just crazy. The way they run is just unbelievable,” added the 20-year-old when quizzed on the experience.

In the men’s decathlon, Willem Coertzen ended in ninth overall after turning in several good performances in the event that ran over two days and comprised 10 different track and field events.