Kipchoge was interviewed by Lewis Johnson after the race on NBC. It was hard to hear exactly what he said but we've rewound it 3 times and think this is it.
When asked about Rupp, Kipchoge said in part, "Rupp is absolutely a very good athlete. I expect a lot from him. I expect Rupp to even run a world record in the marathon."
Lewis Johnson wanted to make sure he heard that right so he asked Kipchoge, "What did you say?"
Kipchgoe responded, "Rupp is good. I expect him to run the fastest time ever in the marathon, yeah."