Trayvon Bromell
Bromell has already been anointed as Usain Bolt's successor in some circles. The American had reinforced his credentials as favourite for the yellow metal in the blue riband events at the Tokyo 2020 after flying to victory in the men's 100M sprint at the recent Gateshead Diamond League.
However his task would be easier said than done with South Africa's Akani Simbine, Canada's Andre de Grasse and Great Britains' Zharnel Hughes all in the mix.
Mutaz Essa Barshim
Bronze at London, silver at Rio, gold at Tokyo? The Qatari world high jump champion continues to make giant strides. His personal best of 2.43M in the IAAF Diamond League meeting in Brussels is the second-best jump of all times in world history.
The 30-year-old is eyeing Cuba's Javier Sotomayor's long-standing record of 2.45M set at the IAAF Salamanca Grand Prix meet in Spain in 1992 and Tokyo would be the perfect stage
Shelly-Ann Fraser-Pryce
The Jamaican is juggling being the fastest woman alive with motherhood as she bids for a third 100M Olympics gold.
The 34-year-old is set for good battle at Tokyo 2020 with compatriot Elaine Thompson-Herah and Great Britain's 200M world champion Dina Asher-Smith.
Sydney McLaughlin
The American, who recently broke the 400M hurdles record when she won the US Olympic trials in Eugene, Oregon in 51.90sec, becoming the first woman to finish the event in under 52sec has set her eyes firmly on an Olympic gold.
Reigning Olympic and world champion Dalilah Muhammad, her chief rival, stands between her and the top of the podium.