American sprinter Justin Gatlin fired out a warning to Usain Bolt in the troubled world of track and field with an impressive victory in the 100 metres in a time of 9.94 seconds at the Monaco Diamond League meet.
The field for the men's blue riband event was stripped of three of its finest in the past week when American Tyson Gay, the second fastest sprinter ever, and Jamaican ex-world record holder Asafa Powell, the fourth fastest, were revealed as having failed doping tests.
Then defending world 100 champion Yohan Blake pulled out injured, leaving Gatlin in prime position to push six-time Olympic and five-time world gold medallist Bolt all the way at next month's world championships in Moscow.