Mo Farah's London Marathon rivals have criticised the runner's decision to compete on Sunday just weeks after collapsing in a race in New York.
Farah, the Olympic 5000 and 10,000m champion, needed treatment after he collapsed at the end of the half-marathon in America.
While Farah downplayed the fall, three of his rivals, including Geoffrey Mutai - who beat Farah to win in New York, have questioned the Brit for deciding to run in his home event, reports BBC Sport.
"To handle sickness is not easy - perhaps I would relax and prepare for another time," he said.
Olympic champion Stephen Kiprotich and London record holder Emmanuel Mutai were the others to voice their opinions.
The race will be Farah's first at this distance since making the switch from track to road. The 31-year-old is will come up against four of the fastest 10 men in marathon history including the current Olympic champion for this event, Uganda's Kiprotich.
And Kiprotich has raised doubts over whether Farah should even have left the track: "I don't see why he's running the marathon," he said.
"He's still good on the track, still running a mile in under three minutes 50 seconds. Maybe the problem is that the fans are the ones that are pushing him."
Farah has insisted he is happy at this distance, however, and has set his sights on breaking Steve Jones' 29-yera-old British record of two hours, seven minutes and 13 seconds.
If the inventor of the 'mobot' is to do that, then he will probably have beaten a number of high quality athletes including Kiprotich, the two Mutais, and last year's race winner, Tsegaye Kebede.
To beat all of them, he may have to at least run close to the world record of 2 hours, 3 minutes and 23 seconds, set by Kenya's Wilson Kipyang, also in this year's field. The race will begin at 10am this Sunday.
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