Question: Are Yuri Matiyasevich and Mikhail Kravchuk both mathematicians?
Sentence (from "2009 Fergana Challenger – Doubles"): Kubot chose to not play and Kravchuk (who partnered up with Lukáš Lacko) lost to more late champions - Pavel Chekhov and Alexey Kedryuk in the quarterfinals.
Relevant evidence: No