Justin Gatlin hopes to recover from injury in time for a possible clash with fellow 100m world record holder Asafa Powell in London on 28 July.
Gatlin is the Olympic and World 100m champion
"I'm still staying in shape," said the Olympic and World champion. "I'm trying to make sure my sharpness is still there, so I can get ready for London."
Gatlin has been sidelined because of injuries to his right calf and knee.
He is down to run the 100m at Crystal Palace, but Powell could avoid a confrontation by switching to the 200m.
Both sprinters have equalled the world record of 9.77 seconds this season, originally set by Jamaican Powell in 2005, but have not yet met on the track in 2006.
Powell turned down an invitation from organisers of Tuesday's Lausanne meeting to replace Gatlin because it was too soon after his Golden League victory in Paris last Saturday.
Now I can rest a little bit and get ready for the second half, which is London and everything after that
Nehemiah, the former 110m hurdles world record holder, described Gatlin's injury as a badly inflamed tendon behind his knee.
"I know that can happen with sprinters and can become a problem from overuse," said Nehemiah.
Gatlin said his right calf had become swollen and slightly strained after he ran three rounds of the 100m at the US championships in Indianapolis last month.
"I got back to Raleigh and tried to train for Athens and hurt myself in the calf," said Gatlin.
"I tried to rest a little bit and then get back to get ready for Lausanne and overcompensated to my knee."
The American added the setback might prove beneficial.
"It gave me a little rest because at the beginning of the season I came out fast and hard," he said.
"Now I can rest a little bit and get ready for the second half, which is London and everything after that."