Two-time Olympic champion Eliud Kipchoge will in September return to the Berlin marathon which he won in world record time in his last outing in 2018. Kenya’s Kipchoge, 37, clocked the record 2 hours 1 minute 39 seconds four years ago for his third Berlin triumph. “Berlin is the fastest course, it’s where a human being can showcase its potential to push the limits,” he said in a statement Friday. On September 25, his rivals will include 2021 winner Guye Adola of Ethiopia in the German capital where some 45,000 runners are expected. Kipchoge has won 14 of his 16 career marathons, including at t…