| Challenger Hamburg | 10/21 10:00 | 28 | [262] Billy Harris v Illya Marchenko [248] | 5-7,6-3,5-7 | |
| Challenger Hamburg | 10/20 09:00 | 27 | [248] Illya Marchenko v Adam Walton [177] | 6-4,6-1 | |
| Challenger Hamburg | 10/18 11:25 | 26 | [248] Illya Marchenko v Altug Celikbilek [295] | 6-4,3-6,7-6 | |
| Challenger Hamburg | 10/17 08:00 | 25 | [244] Oleksii Krutykh v Illya Marchenko [248] | 2-6,3-6 | |
| Challenger Bratislava | 10/13 12:30 | 27 | [188] Joris De Loore v Illya Marchenko [271] | 6-3,3-6,7-6 | |
| Challenger Bratislava | 10/12 14:00 | 26 | [271] Illya Marchenko v Norbert Gombos [289] | 4-6,6-3,7-5 | |
| Challenger Bratislava | 10/10 12:15 | 25 | [196] Dennis Novak v Illya Marchenko [271] | 6-7,0-6 | |
| Challenger Bratislava | 10/09 11:20 | 19 | [271] Illya Marchenko v Kacper Zuk [301] | 7-5,7-5 | |
| Challenger Bratislava | 10/08 13:10 | 14 | [271] Illya Marchenko v Evgeny Karlovskiy [474] | 6-2,7-6 | |
| Challenger Mouilleron le Captif | 10/03 13:40 | 25 | [271] Illya Marchenko v Benjamin Bonzi [98] | 6-7,6-7 | |
| Challenger Columbus | 09/18 22:40 | 25 | [197] Tennys Sandgren v Illya Marchenko [272] | 6-2,6-1 | |
| Challenger Cary | 09/13 18:40 | 26 | [472] Toby Samuel v Illya Marchenko [273] | 7-5,6-7,6-1 | |
| Challenger Cary | 09/11 21:30 | 25 | [273] Illya Marchenko v Enzo Couacaud [178] | 6-4,7-6 | |
| ATP Winston-Salem | 08/21 19:25 | 24 | [267] Illya Marchenko v Rinky Hijikata [111] | 6-4,3-6,2-6 | |
| ATP Winston-Salem | 08/20 17:00 | 19 | [264] Illya Marchenko v Omni Kumar [383] | 6-4,6-4 | |
| ATP Winston-Salem | 08/19 15:00 | 14 | Illya Marchenko v Filippo Moroni | 6-3,6-4 | |
| Challenger Salinas | 07/29 16:00 | 29 | Matija Pecotic v Illya Marchenko | 4-6,4-6 | |
| Challenger Salinas | 07/28 18:10 | 28 | [222] Giovanni M Perricard v Illya Marchenko [328] | 6-7,4-6 | |
| Challenger Salinas | 07/27 15:00 | 27 | [328] Illya Marchenko v Rio Noguchi [231] | 6-3,3-6,7-6 | |
| Challenger Salinas | 07/26 17:05 | 26 | [253] Evgeny Donskoy v Illya Marchenko [328] | 5-7,5-7 | |
| Challenger Salinas | 07/24 18:40 | 25 | [398] Omni Kumar v Illya Marchenko [328] | 6-3,3-6,4-6 | |
| ATP Newport | 07/17 17:25 | 19 | [252] Li Tu v Illya Marchenko [320] | 6-3,6-2 | |
| ATP Newport | 07/16 16:00 | 14 | Donald Young v Illya Marchenko | 1-6,3-6 | |
| Challenger Chicago | 07/13 15:00 | 26 | [338] Illya Marchenko v Juncheng Shang [155] | 5-7,3-6 | |
| Challenger Chicago | 07/11 16:40 | 25 | [232] Dane Sweeny v Illya Marchenko [338] | 4-6,4-6 | |
| Challenger Chicago | 07/10 15:00 | 19 | Cannon Kingsley v Illya Marchenko | 6-7,1-6 | |
| Challenger Chicago | 07/09 19:30 | 14 | [500] Jaimee Floyd Angele v Illya Marchenko [338] | 6-7,4-6 | |
| Challenger Bratislava | 06/15 10:30 | 26 | [266] Vitaliy Sachko v Illya Marchenko [345] | 7-5,6-1 | |
| Challenger Bratislava | 06/13 15:00 | 25 | [293] Dino Prizmic v Illya Marchenko [345] | 2-6,4-6 | |
| Challenger Bratislava | 06/12 13:45 | 19 | [420] Daniel Dutra Da Silva v Illya Marchenko [345] | 4-6,6-7 |
Wikipedia - Illya Marchenko
Illya Vasylovych Marchenko (Ukrainian: Ілля Васильович Марченко) (born 8 September 1987) is a Ukrainian professional tennis player. He has a career high in singles of World No. 49 achieved on 26 September 2016 and of No. 268 in doubles achieved on 25 August 2014. On the ATP Tour, Marchenko reached the semifinals of Moscow in 2009, the 2010 St. Petersburg Open and Doha in 2016.
He is noted for his backhand, which he cites as his best shot. His favorite surface is hard courts.