Mo Farah ready for hard challenge

Mo Farah takes on his biggest challenge since his golden Olympics (PA)

Mo Farah takes on his biggest challenge since his golden Olympics when he faces a strong field featuring the brothers Kenenisa and Tariku Bekele in the 10,000m at the Prefontaine Classic in Eugene, Oregon.

Farah says he feels "invincible" as he has not been beaten on a track outdoors since the 2011 World Championships when Ethiopia's Ibrahim Jeilan pipped him to gold in the 10,000m.

Farah said: "I still feel invincible. But I've got to be even more ready than I was last year as there are a lot of eyes on me."