The 30-year-old was withdrawn from his 200m heat last night on medical grounds but had hoped to race in the final of the 400m tonight. But after vomiting again today, Makwala was told by athletics authorities that he had again been pulled out of the race to protect the health of other athletes. The Botswanan had been caught up in a spate of illness that had affected 30 athletes and support staff at the Tower Hotel with two cases confirmed as norovirus. However, Makwala told the BBC earlier today that he was "ready to run" and believed he was fit enough to do so.

GETTY Isaac Makwala looks set to miss out on the 400m final

GETTY Isaac Makwala was one of the favourites for the 200m and 400m

The runner then arrived at the London Stadium this evening and tried to gain access through the athletes' entrance but was barred by officials from doing so. And now Falcon Sedimo, chief executive of the Botswana National Sports Commission, has slammed the IAAF for not being open about their decision. "For us, the important thing is that there should have been formal communication from the IAAF," Semido said. "There has been none. We only had benefit from the media relating to Makwala's not being allowed to compete which left us heart-broken.

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"He's been waiting for years to see himself here. "He definitely was a gold medal contender, not only in the 200 but we believe he was going to be in the 400m as well." Makwala was taken back to the team hotel after being denied entry to the stadium although Semido said he was ready to race if the Botswanan delegation were able to convince the IAAF to reverse their decision ahead of the 9.50pm 400m final.