Big French hope Urgent De Gregaine is only "50-50" to run in the Glenfarclas Chase at the Cheltenham Festival.
The Emmanuel Clayeux-trained nine-year-old is prominent in the betting for the cross-country race on March 15 after he won so well over course and distance in January.
But Clayeux said: "I don't know if he will run yet and I will make a final decision on Monday.
"He is perfectly OK, and has been fine after his last run, but he will have to carry a lot more weight at the Cheltenham Festival and he is only a small horse.
"We have given him an entry, but at the moment I think it is only 50-50 that he will run."
Urgent De Gregaine is as low as 11/2 about winning the Glenfarclas Chase, with Cantlow, whom he defeated by three lengths at Cheltenham in January, the short-priced favourite.