Mo Farah to concentrate until 2016 Rio Olympics

Athletics: Double Olympic champion Mo Farah has described this as his "toughest year" and said he will focus on the track up until the 2016 Rio Olympics.

Farah, 31, has endured a troubled 2014, withdrawing from the Commonwealth Games in Glasgow because of fitness concerns.

The Briton was also disappointed with his eighth-place finish on his London Marathon debut in April.

"It's been difficult, from the marathon where I wanted to do better, to getting ill. It's been a struggle," he said.

But the Londoner, who became the most successful non-relay athlete, male or female, in European Championships history with double distance gold last week, added: "It's been an up and down year but I'm back on top now."

The Briton said he had learned from his London Marathon experience, but admitted he was not yet ready to compete over the 26-mile distance.

"After Rio we'll try again but for now I'll concentrate on the track," he said.

"It's been the toughest year of my career for sure, certainly the toughest I've had for many years. I hadn't been injured for many years and this season was tough.

"I'm already looking ahead to the 2015 World Championships in Beijing but in long distance running you can only take one year at a time, you can't look two years beyond. But yes, it's obviously there."

The recently-crowned 5,000m and 10,000m European champion will race over two miles at Sunday's Birmingham Diamond League, his first meeting in Britain since the London Marathon.

Farah will be one of a number of British athletes at Alexandra Stadium who shone at the European Championships in Zurich, helping Britain top the medal table for only the third time in their history.