KINGSTON, Jamaica — The morning session of today’s track and field was a show of dominance by the Jamaican men and their American counterparts in the 100m.

Six of the seven heats were won by athletes from the two countries, while the last was won by Dwain Chambers of Great Britain (10.02).

The Americans charged through the first three heats with Tyson Gay (10.08), Justin Gatlin (9.97) and Ryan Bailey all getting easy victories.

Gatlin and Bailey produced the only sub-10 times of the round, Bailey equaling his personal best with a superb 9.88 clocking.

The Jamaicans followed, led by Usain Bolt who jogged to 10.09 after stumbling out the blocks. After the race Bolt said he was happy to have gotten it out the way.

Teammate Asafa Powell would also have a minor setback, almost running out his lane, but coasting to 10.04.

Reigning world champion Yohan Blake was the fastest Jamaican qualifier with 10.00 in Heat 6.

The 400m proved less fruitful for Jamaica with two of three Jamaicans failing to make it out the first round.

Only national champion Dane Hyatt has made it to the semi-finals after Jermaine Gonzalez and Rusheen McDonald both finished down their fields. Gonzales is said to be suffering from a lingering hamstring injury.

Leford Green is the lone Jamaican left in the men’s 400m hurdles semis which starts at 1:00pm.

The women’s 400m semis will feature in the afternoon session where three Jamaicans, Novlene Williams-Mills, Rosemarie Whyte and Christine Day, take part. That event kicks off at 2:05 pm.

The day’s big event however, is the final of the women’s 100m at 3:55pm where as many as three Jamaicans could factor in.

Reigning champion Shelly-Ann Fraser-Pryce, 200m champion Veronica Campbell-Brown and Kerron Stewart will seek to add to their international medal haul then.