World 100m record-holder Asafa Powell has been included in the Jamaica squad for next month's World Championships despite doubts over fitness.
The 22-year-old a tore a groin muscle during the 100m final at the London Grand Prix at Crystal Palace on Friday.
Powell's agent Paul Doyle said: "He has a two-and-a-half centimetre rip in the muscle and has started treatment.
"The doctor says it is possible Asafa will not be at 100%, but he cannot predict it."
Powell is being treated by eminent German doctor Hans-Wilhelm Mueller-Wohlfahrt.
And Doyle said they would have a better idea of whether Powell will make Helsinki when he is able to run again, hopefully in a week's time.
Powell, who set the new mark of 9.77sec in Athens last month, originally suffered the groin injury at the Jamaican Championships on 26 June.
Doyle said there was a possibility Powell could run in the sprint relay even if he missed the individual event.
Powell has had desperate luck in the major events.
He was disqualified from the World Championships at the quarter-final stage in 2003, and at the 2004 Olympics he finished fifth in the 100m and pulled out of the 200m.