Lee Westwood was involved in a hospital drama in Paris, but still hopes to play the Alstom Open de France.
There was real concern for the World Number Three after he was initially told that swelling in his right calf and ankle might be a blood clot.
But after pulling out of the pro-am at Le Golf National - as Ian Poulter, Colin Montgomerie and Matteo Manassero did for different reasons - and being driven away with his wife Laurae, further tests brought good news.
Management spokesman Stuart Cage said: "The doctor has decided there is no DVT (deep vein thrombosis) or blood clot and that the problem has something to do with a reaction to the heat.
"Lee is going to have an anti-inflammatory dressing put on the muscle and, if he rests up tonight, then hopefully the swelling will go down and he will be able to play tomorrow.
"He is certainly going to go to the course in the morning and make a decision then."
Westwood, who lost a play-off to Martin Kaymer last year, has this scheduled to be his final European Tour event before The Open Championship at St Andrews.
Cage had earlier stated: "Lee felt pain in the calf and it was swollen yesterday, but when he woke this morning his ankle was swollen too.
"Obviously he has to take the doctor's decision seriously because it's a very important time of the year with The Open coming up."
Poulter will also make a late decision whether to compete after reacting badly to an insect bite on his right shin.
The World Number Eight believes a horsefly might have been responsible while he was practising at Woburn on Monday.
"It was swollen yesterday and when I put my hand in my pocket I felt a big lump on my groin and knew it wasn't right," Poulter said.
"I went to the doctors, was given antibiotics and decided I was well enough to fly this morning, but that's probably not done it any good.
"An English doctor said I should go and have an intravenous drip, but the French one did not think that was the right thing to do and has given me tablets.
"I'll come up in the morning to see how it is. Hopefully I'll be okay, but walking for five hours is not going to do it any good and nor is the heat."
Montgomerie was under treatment all last week in Munich for both a torn calf muscle and Achilles strain, and it came as no surprise when he decided to rest it.
As for Manassero, the 17 year old Italian was hit on the hand by a stray shot while practising on Tuesday.
Last year's British Amateur Champion, who finished a spectacular 13th in The Open Championship soon after, has been assured there is no break and is keen to play after being given one of seven invitations he is allowed after turning professional following The Masters Tournament in April.
Definitely not teeing off is England's Ross McGowan. Fifth in the current Ryder Cup table, McGowan came off the course during last week's BMW International Open with a recurrence of wrist trouble and has withdrawn. Scot Steven O'Hara replaces him.
Westwood and Poulter are among four of the world's top ten in the field, Luke Donald and Rory McIlroy being the others.