MO Farah has criticised the degree of attention given to his relationship with controversial coach Alberto Salazar and claims some critics are “trying to destroy” his legacy.

The four-time Olympic champion hit out having been asked about Salazar after winning 5000 metres silver at the World Championships in London on Saturday.

Salazar is being investigated by the US Anti-Doping Agency and did not attend the World Championships.

Farah joined Salazar’s Nike Oregon Project in 2011 and the pair have enjoyed huge success together, with the British star winning four Olympic gold medals and six world titles – including his 10,000m crown last week.

Their success has not come without scrutiny and Farah – who will retire from the track at the end of the month to focus on road racing– feels it is unfair.

He said: “It’s like a broken record, repeating myself, if I’ve crossed the line, if Alberto’s crossed the line ... why bring it up year after year, making it into headlines? I’ve achieved what I have achieved – you’re trying to destroy it.

“You have to educate the right people to say what’s fair. So many times, you guys have been unfair to me. I know that. But say it how it is.

“I want you to write the truth about what’s out there and educate people out there. But be honest with them.

“There’s nothing else to be said. History doesn’t lie. I’ve achieved what I have through hard work and dedication, year after year.

“Sometimes I find it bizarre how certain people write certain things to suit how they want to sell the story.”