By Reuters Staff5 Min ReadTOKYO( Reuters)-Jamaica look favourites to top the podium in the women’s 100 metres for a fourth successive Olympics but plenty of competitors will be bidding to end the streak. FILE PHOTO: Athletics-JAAA National Senior Championships-National Stadium, Kingston, Jamaica-June 27, 2021 Jamaica's Shelly-Ann Fraser-Pryce celebrates after winning the women's 200 m REUTERS/ Gilbert Bellamy Here are eight contenders who may challenge for medals on July 31. SHELLY-ANN FRASER-PR