Olympic champion Usain Bolt is set to take the field later tonight for the Monaco Diamond League 100m race but the rest of the field competing has caused some controversy.

It is particularly regarding the absence of Andre De Grasse, who has been in great form so far this year, however, it has been claimed Bolt had a major part in his rival being 'booted out'.

De Grasse, despite not competing in the 100m event, is still present in Monaco as he is scheduled to race for Canada's 4x100m relay team.

His coach Stuart McMillan gave an interview to the Canadian media to reveal why he thought Bolt had been behind his athlete's exclusion.

McMillan said, as reported by The Telegraph: "We were in the [100m] race. We got booted out. That’s all on Bolt.

"Let's just say he wanted not such an elite field against him.

"The fastest guy in the world gets to choose the field. But I don’t blame him at all.

"This is his last year, he’s only raced twice. I totally understand that he doesn’t want to increase the pressure prior to Worlds by going in with a potential loss.

"If anyone deserves the right to choose the field, it’s Bolt."

However, Bolt's management team have hit back by denying those claims and told the Telegraph they had no part in the exclusion of the De Grasse or the make-up of the rest of the field.

The 30-year-old announced that he will retire from the sport after the 100m and 4x100m relay races in the World Championships set to take place in London next month.

So far this season he has raced twice in 100m track events but has looked somewhat sluggish for the most parts despite registering victories over relatively weak fields in 10.03 secs in Kingston, Jamaica and 10.06 secs in Ostrava, Czech Republic.

Ahead of the final race before he takes part in the World Championships, Bolt was asked whether he is concerned about anybody in particular.

He replied: "The youngsters who are coming up are doing great. But I’m never worried about any one athlete. You always find youngsters coming up and doing great.

"I respect that and I wish them all the best, but I’m never worried about one person because I know what I’m capable of."

He also insisted that he is ready to defend his world title in London, despite suffering from back problems in recent months.

"I’ve been to the doctor and he’s worked on my back, which has always been an issue.

"It didn’t really stop me from training but it was a little bit difficult. But I’ve been working with the doctor and he’s improved me a lot.

"It’s not perfect but it should be fine."