Kenyan great Eliud Kipchoge bettered his own marathon world record by half a minute when he won for a record-equalling fourth time in Berlin. Two-time Olympic champion Kipchoge clocked 2 hours 1 minute 9 seconds to erase the record of 2:01:39 hours he had clocked 2018 in the German capital. Compatriot Mark Korir was a distant second, 4:49 minutes back. Kipchoge’s previous Berlin wins were in 2015, 2017 and 2018 and with his latest success he drew level with Ethiopian great Haile Gebrselassie who also won four times there. He has now won 15 of his 17 official marathons, including Olympic gold 2…