Pakistan, Aug. 2 -- Reigning 100m world champions Sha'Carri Richardson and Noah Lyles cruised through their opening heats at the USA Track and Field trials on Thursday as they build towards the defence of their global titles at September's World Championships.

Both Richardson and Lyles have already booked their tickets to Tokyo due to their status as reigning champions, but are using this week's meeting at Hayward Field in Eugene, Oregon, to hone their form.

The charismatic Richardson finished ninth at the Prefontaine Classic at Eugene earlier in July in a modest time of 11.19 sec.

But the 25-year-old Texan indicated she is making progress after finishing second in her heat in a time of 11.07sec, behind Kayla White in 10.89sec.

Richar...