Jamaica track team doctor Winston Dawes expects Usain Bolt to be in prime shape to defend his three Olympic titles.
Bolt has been struggling with niggling leg and back problems in recent weeks which have translated themselves into some relatively poor times, while he was also beaten by Yohan Blake in the 100 metres and 200m at the Olympic trials.
Dawes, however, is confident world record holder Bolt will be in peak condition as he attempts to retain both titles as well as helping Jamaica keep their 4x100m crown.
"He's back fully," Dawes said. "He has been training very, very hard and his performance is on track.
"We expect he'll be fully fit by the time the Olympics come around.
"He had some slight cramps [in his legs]. He had had an accident before, so that might have shaken him up a little."
Bolt was unharmed in a minor road accident in Jamaica last month.
Dawes believes sprint rivals Bolt and Blake could reach new heights in London.
"Both of them are at the top of their game," he said.
"If the conditions are ideal, then we are going to see something fantastic. We may see records go.
"They are 100 per cent fit and 100 per cent raring to go. They are mentally fit and they are going to be going all out."