Tebogo had to settle for second place in an earlier race over the shorter distance, but that proved to be an ideal preparation for the longer sprint an hour later, where the world under-20 100m record holder won in 19.87sec, taking 0.09 off his previous best of 19.96 set in securing silver at last year's World U20 Championships in Cali.

It was the perfect finale for the second Continental Tour Gold meeting of the season as he finished clear of Canada's Aaron Brown, who won world 4x100m gold in Oregon last summer, and clocked 20.00.

Liberia's Joseph Fahnbulleh was third in 20.14.

"In the 200m my body wasn’t responding, but I’m proud of it because it shows me that I can keep pushing forward," said the two-time world under-20 100m champion after celebrating with spectators on his victory lap.

"At the curve, I was neck-to-neck with Aaron Brown, but in the last 50 metres I had that one last kick and I managed to finish the race.

"I’m really happy for the crowd, because it shows that Botswana people love sport.

"They should always come in numbers, so that they can make the sport grow."

Tebogo clocked a wind-assisted 9.91 (2.3m/s) in the earlier 100m, equalling his legal personal best and finishing runner-up to Kenya's African record-holder Ferdinand Omanyala, who ran 9.78.

Olympic and world 200m silver medallist Kenny Bednarek of the United States, who like Tebogo was racing his first 100m of the season, finished third in 10.02.

In the men's 400m, there was a huge personal best by another prodigious young African sprinting talent -  Zambia's 20-year-old Birmingham 2022 Commonwealth champion Muzala Samukonga - who won in 43.91, moving into the top 20 on the world all-time list.

Samukonga - who set his previous best of 44.66 in winning the Commonwealth title - tired in the closing stages but had built enough of a lead to still win clear ahead of Grenada's 2012 Olympic champion Kirani James, who clocked 44.76, and Botswana's Leungo Scotch, who dipped under 45 seconds for the first time with 44.92.

There was a surprise defeat in the women's 200m for Sha’Carri Richardson, who recorded a wind-assisted 10.57 100m earlier this month.

She was beaten by United States compatriot Kayla white, who won in 22.38 from Richardson in 22.54.

Kenya's Commonwealth champion and world bronze medallist in the women’s 800m, Mary Moraa, also started her outdoor season in style as she dropped back down to the 400m - her previous specialist distance - and won in a Kenyan record of 50.44.

Moraa, who also won last year’s Wanda Diamond League 800m title, finished more than half a second ahead of South Africa's Miranda Coetzee, who recorded 51.14.

Twanisha Terry dipped to victory in the women's 100m.

The 24-year-old - who formed part of the United States' world gold medal-winning 4x100m team in Oregon last year - clocked 11.05 to beat Egyptian record-holder Bassant Hemida, who recorded 11.09.

Trevor Bassitt of the United States, a 2022 world bronze medallist, held off the challenge of South Africa's Sokwakhana Zazini to win the 400m hurdles in 48.43, with Zazini, 23, setting a personal best of 48.58.

Kenya's world indoor 1500m bronze medallist Abel Kipsang judged his race to perfection to pass his rivals in the closing stages and take the men's 800m, while the women's race was won by Ethiopia's Olympic finalist Habitam Alemu in 1:59.35.

Nigeria's world silver medallist Ese Brume saved her best for last to win the women's long jump competition as she leapt 6.77m in the final round.