Olympic gold medalist Justin Gatlin has told Japanese sprinters that posting a sub-10-second mark is a feat, but ultimately not difficult to achieve.

If you have the right mind-set, he believes, it will come.

Speaking at a Saturday news conference for Sunday's Golden Grand Prix Tokyo meet at National Stadium, the third event of the IAAF World Challenge 2014 season, Gatlin, a veteran American athlete whose personal best is 9.79 seconds in the 100 meters, insisted that, as much as polishing your techniques is important, having the right mentality will bring you better marks.