In the World Athletics Championship, Botswana's Isaac Makwala joined South African favourite Wayde van Niekerk in the 200m final – having earlier qualified for the semis with a solo run at London Stadium.American Isiah Young won the first semi-final in 20.19secs to join the final line-up.Makwala missed Monday's heats while barred from competing as officials dealt with a norovirus outbreak. He came out of quarantine on Wednesday and ran a time of 20.20 seconds in an individual time trial to qualify from the first semi-final.Van Niekerk was running his fifth race in as many days as he looks to add the 200m title to his 400m gold.