He met with the press today for more than 10 minutes in Boston. Said that he developed an issue in his left leg around 30k. Didn't think the weather or the hills had anything to do with it. And said he "absolutely" plans on coming back and winning Boston one day.
Toward the end, he got testy when a reporter asked him why he didn't want to talk to the media on Monday after the race. Kipchoge disputed that and said he didn't refuse to talk and then made sure everyone had a chance to answer any questions before his availability was over today. (Now it's possible that one of Kipchoge's handlers didn't relay the media's request to talk to him yesterday but the fact is, the BAA tried to make him available and he did not talk on Monday).
Full interview below: