Answer
The answer is 5000 meters. Coe never held a world record in this distance, although he did come close on several occasions. His personal best of 13:00.40, set in 1981, was only 0.46 seconds slower than the world record at the time. Coe's dominance was primarily in the 800 and 1500 meters, where he held multiple world records and won numerous Olympic and World Championship medals.