Jamaica’s Elaine Thompson-Herah wins Tokyo Olympics gold to defends 100m title

Jamaica’s Elaine Thompson-Herah has broken Florence Griffith Joyner’s Olympic record in the women’s 100 metres to successfully defend the gold medal she won in Rio in 2016.

Thompson-Herah ran a personal best time of 10.61 seconds, to dip under the previous Olympic mark — set by Griffith…