South Africa's Caster Semenya strides smoothly into 800m final

Caster Semenya

Caster Semenya

Both the American and Niyonsaba pushed hard round the back straight and the final bend to shake off Semenya, though the South African remained strong and breezed past both in the final 100m to regain the title she won in Berlin eight years before.

Burundi's Francine Niyonsaba, the Olympic silver medallist, finished second in 1:55.92, with American Ajee Wilson taking bronze (1:56.65).

Caster Semenya wins gold!

South African Caster Semenya, dogged by gender accusations since shooting to fame in 2009, won a third world title in the women's 800m on Sunday.

Sunday's victory crowns a sensational championships for the Rio Olympic champion, although it wasn't plain sailing in the 800m final.

Wilson went out fast, with Niyonsaba on her coattails and Semenya happy to sit back in the pack.

In fact, Semenya was in sixth position at the bell in 58.53 seconds for the first 400m, well behind leader Niyonsaba in 57.98.

Ajee Wilson, who set a USA record of 1:55.61 last month and has been in hot form, looked superb in winning the first heat in 1:59.21 from Melissa Bishop, the 2015 silver medallist from Canada who looked more like her normal self after labouring through the first round.

Her gold medal also means that Team South Africa can rejoice with a record medal haul of six at a world championships, with golds to Semenya and Luvo Manyonga (long jump), a gold and silver to Wayde van Niekerk (400m and 200m), and bronzes to Semenya (1 500m) and Ruswahl Samaai (long jump), which places them in third position on the overall medal table!