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.