100m champion Alfred starts bid for second leg of Olympic sprint double
Five-time Olympic champion Thompson-Herah names new coach after split with ex-trainer
Jamaica sprint queen Elaine Thompson-Herah splits with coach ahead of Olympics
Richardson backs up world 100m gold in Zurich
Lane nine just fine for American loner Sha'Carri Richardson
Jamaica's Jackson sizzles to world lead in 100-metre with world-leading time
Thompson-Herah and Kiplimo complete stunning golden double to light up Games
