Lalonde Gordon wins Heat 4 of the 400 metres in 45.24.
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George Bovell swam 22.30 to place 3rd in the 50 metres freestyle preliminaries in Rio.
However, his time was not enough to get him into the semi-finals tonight.
Only the swimmers with the top 16 times go through.
Bovell swam in lane 7 in Heat 8 at 12.16 Thursday afternoon.
SEE ALSO: Watch video of George Bovell's race
The race was won by Yu Hexin of China in 22.20.
Filip Wypych of Poland was second in 22.23 seconds.
Laser sailor Andrew Lewis has placed 34th in the sixth race in Rio.
This has helped him move up just one spot in the overall standings from 43rd at the end of Race 5, to 42nd.
Lewis had placed 42nd in Race 1, 34th in Race 2, 39th in Race 3, 36th in Race 4 and 41st in Race 5.
There are 10 races in the preliminary events.
There is no competition in this event on Thursday.
Lewis will next participate on Friday in Races 7 and 8 tand Races 9 and 10 on Saturday.
The medal race is on Monday.
Despite placing first in Heat 4 of the 100 metres freestyle swimming event at the Rio Olympics, T&T swimmer Dylan Carter has not qualified for the semi-finals.
Carter's heat-winning time of 48.80 seconds placed him 23rd on the list of competitors for the event.
WATCH FULL RACE: Swimmer Dylan Carter places 1st in 100 metres heat
Only the swimmers with the top 16 times have qualified for the semi-finals.