Reigning double Olympic sprint champion Elaine Thompson-Herah headlines a large field of world-class athletes down to compete at the inaugural North American, Central American and Caribbean Athletics Association (NACAC) New Life Invitational this Saturday at the Ansin Sports Complex in Miramar, Florida.

On Sunday, Briana Williams promised she would break her one-day-old U20 record today and she delivered with a brand new personal best to win the 100m at the Duval County Challenge in Jacksonville, Florida earlier tonight.

Williams, 19, who set a new national U20 record of 11.01 on Sunday, clocked a new personal best of 10.98, despite a poor start to record her second win in as many days.

Mikiah Brisco finished second in 11.09 with Dezerea Bryant finishing third in 11.14.

Williams had given a hint of what to expect in the preliminary round when she ran 10.97 to win her heat. However, the trailing wind of 2.5m/s prevented that time from being recognized as the Jamaican national U20 record.

In the final, the wind was only 1.0 m/s well below the allowable limit of 2.0m/s.

Earlier, Yohan Blake was second in the 100m clocking 10.09s as he trailed the USA’s Ronnie Baker across the line. The American clocked 9.99.

Marvin Bracy-William was third in 10.11.

Williams wasn’t the only Jamaican with a new personal best Monday night, as promising sprint hurdler Britanny Anderson clocked 12.59 to win the 100m hurdles. It was almost a duplicate of the 12.58 lifetime best she ran in the preliminary round, except for the poor start in the final where she defeated Christina Clemons, who clocked 12.64 for second place narrowly edging 2015 World Champion Danielle Williams who ran 12.65 for third.

Earlier, Javon Francis won his 400m race in 45.84. Quintaveon Poole was second in 45.87 and Myles Pringle third in 46.11.

The BVI’s Ashley Kelly won her 400m in 54.86 over Belize’s Samantha Dirks 55.01 and Canada's Carline Muir 55.48.

Shamier Little won the 400m hurdles in a world-leading 53.12 beating Jamaica’s Ronda Whyte, who ran a season-best 54.33 for the runner-up spot. Her compatriot Shiann Salmon, also ran a personal best of 54.97 for third.

Shaunae-Miller-Uibo had another impressive outing in what is becoming an outstanding season when she won the 200m straight run at the Boost Boston Games on Sunday. The imperious Bahamian was among several Caribbean athletes including Natoya Goule, Michelle-Lee Ahye and Jereem Richards, who were victorious at the meet held in the streets of Boston.

Miller-Uibo, who has yet announced whether she will be defending her 400m title in Tokyo or step down to the 200m in which she has the world-leading time, destroyed the field to win in 22.08.

The USA’s Kortnei Johnson was second in 22.40 and Wadeline Jonathas third in 22.57.

The men’s event went to Canada’s Jerome Blake, who ran a personal best 19.89 defeat Zharnel Hughes, who also ran a personal best of 19.93. Third was Aldrich Bailey Jr of the USA, who clocked 20.45.

Goule outsprinted long-time rival Ajee Wilson to win the 600m in a national record and world-leading time of 1:24.77. Wilson clocked 1:25.007 for second place while Allie Wilson ran 1:25.270 for third.

Trinidad’s Michelle-Lee Ahye, who was fourth in the 200m, had a better showing in the Women’s C 100m that she won in a season-best 11.22. Kristal Awuah of Great Britain was second in 11.46 leaving Trinidad’s Kelly-Ann Baptiste to settle for third in 11.56.

The Women’s B 100m was won by the USA’s Kiara Parker, who clocked a season-best 11.07. Jamaica’s Ashanti Moore ran 11.18 for second while the USA’s Hanna Cunliffe was third in 11.23.

Aleia Hobbs ran 11.05 to win the A final in an American sweep. Gabby Thomas was second in a season-best 11.16 with Morolake Akinosun running 11.17 for third.

Isiah Young ran a season-best 9.94 to win the Men’s 100m over compatriot Noah Lyles who clocked 10.10. They finished ahead of Jamaica’s Nickel Ashmeade, who ran 10.17 for third.

Meanwhile, Richards the Commonwealth Games 200m champion, ran 14.75 to win the 150m ahead of Yohan Blake, who clocked 14.940 for second. The USA’s Andrew Hudson also clocked 14.940 but was given third.

Barbados’ Shane Brathwaite ran 13.71 to finish second in the 110m hurdles that was won by the USA’s Grant Holloway in 13.20. Hungary’s Valdo Szucs was third in 13.72.

Among the youngsters, 17-year-old American phenom Erriyon Knighton won the Adidas Future Stars Men’s 100m in a fast 10.16 beating a Jamaican trio of Ryiem Forde (10.18), Jelani Walker (10.34) and Michael Stephens (10.35).

Shian Salmon won the 200m hurdles 24.86 beating USA’s Shamier Little (24.91) and Ronda Whyte (25.71), who were second and third, respectively.

Caribbean athletes Shadae Lawrence and Shane Brathwaite scored victories in the discus and sprint hurdles, respectively at Saturday’s USATF Sprint Summit in Prairie View, Texas, where several of their regional compatriots also had podium finishes.

Omar McLeod was a winner in the 60m hurdles at the American Track League meeting in Arkansas earlier today but his win was among several standout performances from several Caribbean athletes, who produced personal best or season-best times.

The 2016 Olympic champion ran 7.53 while holding off the challenge of American Michael Dickson who crossed in 7.58. Trinidad and Tobago’s Ruebin Walters was third in 7.68.

In the women’s equivalent, Great Britain’s Tiffany Porter won in 7.95 just managing to hold off a fast-finishing Brittany Anderson, who was 0.02 behind in 7.97. Gabbi Cunningham was third in 8.08. Rushelle Burton returning to competition from injury was fourth in 8.20.

For the second week running Nigeria’s Blessing Okagbare managed to hold off Christania Williams in the 60m dash. This time, however, the Nigerian ran a personal best of 7.10 after separating from the Jamaican who equalled her personal best of 7.14.

Teahna Daniels of the USA was third in a season-best 7.17.

The winner of the Women’s 400m was determined over two heats by time trial and Shamier Little was easily the fastest winning Heat One in a personal best 51.33. Shakima Wimbley also of the US took second after winning Heat Two in 52.12.

Jamaica’s Shian Salmon ran a personal best of 52.85 for second in Heat One but was third overall.

In the men's event, Michael Cherry of the USA won heat one in a personal best 45.24 for the win. Second and third were determined by a battle between Deon Lendore of Trinidad and Tobago and Christopher Taylor of Jamaica. Lendore emerged as the second-place finisher after winning Heat 2 in 46.08 to Taylor' 46.09, which was good enough for third overall.

Laquan Nairn jumped a personal best and national record 8.16m in the Men’s Long Jump but had to settle for second as the USA’s Marquis Dendy won the event with a world-leading 8.21m on his final jump of the competition.

Charles Brown of the USA was third with a jump of 7.81m.