Istomin if he is fit he should win this easy. Istomin has a great serve and Harrison doesnt have the returnplay to break it down. Istomin retired last match so dont play this at oneball bookie. Harrison was a big talent but he hasnt become the great player, its a hard step to take to atp tour. Harrison lost his last match easy vs Yani and this 2 players h2h is 1-0 istomin, a easy win on hardcourt last year 7-5 6-0. A istomin in 80% of his fully capacity would win this easy, he was great in Australian.