Berlin: World Athletics, the governing body of international track and field competitions, has ratified Ethiopian star Tigist Assefa’s women's marathon world record of 2:11:53 set in Berlin last year. 13 women were still in contact with the lead as they reached 10km in 31:45, the World Athletics informed in a statement on Thursday. Less than two kilometres later, Assefa was alone out in front and she went on to reach the halfway stage in 1:06:20, comfortably inside world record pace. Spurred on by the knowledge that the world record was in the bag, Assefa picked up her pace in the closing kilometres and charged through the finish line in 2:11:53. IANSAlso Read: Ethiopian runner Tigist Ketema breaks world record for fastest marathon debutAlso Watch: