Fantastic interview on the FP right now, but in it Gray says of his 1:42.60 run, "And I went out in 51, if I can remember, my first lap was 51.3-something and I came back with a 51.2-something."
That was probably the most surprising detail in the interview for me. Before this, I thought the fastest ever negative-split 800m was David Rudisha's 1:42.84 (51.59, 51.25) at the 2010 African championships:
Are there any official splits or video available online to corroborate Gray's claim? If he could run a negative-split 800 faster than the GOAT -- what does that say about his ceiling?