| Urbana – Singles | |
|---|---|
| 2012 JSM Challenger of Champaign–Urbana | |
| Champion |  Tim Smyczek |
| Runner-up | Jack Sock |
| Score | 2–6, 7–6(7–1), 7–5 |
Alex Kuznetsov was the defending champion.
Tim Smyczek defeated Jack Sock 2–6, 7–6(7–1) and 7–5 in the final to win the title.
Michael Russell (quarterfinals, retired)
Mischa Zverev (first round) Denis Kudla (second round) Ryan Sweeting (quarterfinals) Bobby Reynolds (first round) Tim Smyczek (champion) Jack Sock (final) Alex Kuznetsov (first round)| Semifinals | Final | ||||||||||||
| 7 | Jack Sock | 6 | 6 | ||||||||||
 Alex Bogdanovic | 4 | 3 | |||||||||||
| 7 | Jack Sock | 6 | 61 | 5 | |||||||||
| 6 | Tim Smyczek | 2 | 77 | 7 | |||||||||
| Rhyne Williams | 5 | 3 | |||||||||||
| 6 | Tim Smyczek | 7 | 6 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | M Russell | 6 | 6 | ||||||||||||||||||||||||
 A Bossel | 4 | 4 | 1 | M Russell | 6 | 6 | |||||||||||||||||||||
 F Wolmarans | 2 | 5 | WC | D Britton | 4 | 4 | |||||||||||||||||||||
| WC | D Britton | 6 | 7 | 1 | M Russell | 1r | |||||||||||||||||||||
| WC | Tim Kopinski | 3 | 2 | 7 | J Sock | 2 | |||||||||||||||||||||
| B Klahn | 6 | 6 | B Klahn | 4 | 5 | ||||||||||||||||||||||
 T Gabashvili | 64 | 6r | 7 | J Sock | 6 | 7 | |||||||||||||||||||||
| 7 | J Sock | 77 | 6 | 7 | J Sock | 6 | 6 | ||||||||||||||||||||
| 3 | D Kudla | 7 | 6 | A Bogdanovic | 4 | 3 | |||||||||||||||||||||
| Q | J Milton | 5 | 3 | 3 | D Kudla | 3 | 2 | ||||||||||||||||||||
| A Bogdanovic | 6 | 4 | 6 | A Bogdanovic | 6 | 6 | |||||||||||||||||||||
| PR | J Witten | 4 | 6 | 3 | A Bogdanovic | 6 | 6 | ||||||||||||||||||||
 G Jones | 6 | 3 | 4 | WC | C Buchanan | 4 | 3 | ||||||||||||||||||||
| WC | C Buchanan | 3 | 6 | 6 | WC | C Buchanan | 6 | 6 | |||||||||||||||||||
| T Sandgren | 6 | 77 | T Sandgren | 2 | 3 | ||||||||||||||||||||||
| 8 | A Kuznetsov | 4 | 64 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 5 | B Reynolds | 3 | 4 | ||||||||||||||||||||||||
| Daniel Smethurst | 6 | 6 | D Smethurst | 5 | 4 | ||||||||||||||||||||||
| R Williams | 6 | 6 | R Williams | 7 | 6 | ||||||||||||||||||||||
| A Krajicek | 2 | 2 | R Williams | 77 | 6 | ||||||||||||||||||||||
| WC | Dennis Nevolo | 6 | 6 | 4 | R Sweeting | 64 | 2 | ||||||||||||||||||||
| Q | C Harrison | 4 | 2 | WC | D Nevolo | 3 | 2 | ||||||||||||||||||||
 C Reix | 2 | 1r | 4 | R Sweeting | 6 | 6 | |||||||||||||||||||||
| 4 | R Sweeting | 6 | 3 | R Williams | 5 | 3 | |||||||||||||||||||||
| 6 | T Smyczek | 6 | 3 | 6 | 6 | T Smyczek | 7 | 6 | |||||||||||||||||||
| M Lammer | 4 | 6 | 3 | 6 | T Smyczek | 6 | 6 | ||||||||||||||||||||
| I van der Merwe | 6 | 6 | I van der Merwe | 2 | 4 | ||||||||||||||||||||||
| Q |  A Dăescu | 2 | 2 | 6 | T Smyczek | 7 | 77 | ||||||||||||||||||||
| J-P Smith | 6 | 6 | J-P Smith | 5 | 60 | ||||||||||||||||||||||
 S-Y Jeong | 3 | 3 | J-P Smith | 77 | 3 | 6 | |||||||||||||||||||||
| Q | C Guccione | 6 | 6 | Q | C Guccione | 63 | 6 | 4 | |||||||||||||||||||
| 2 | M Zverev | 4 | 3 | ||||||||||||||||||||||||
Rajeev Ram was the defending champion; however, he lost to Kuznetsov in the second round. Alex Kuznetsov won in the final 6–4, 7–6(1), against Tim Smyczek
Mardy Fish was the defending champion, but had to retire in his second round match against Gilles Müller.
Brian Baker was the defending champion, but chose not to compete.
Ryan Harrison won the final 6–2, 6–3 against Facundo Argüello.
Carsten Ball and Bobby Reynolds were the defending champions but decided not to participate together.
Ball played alongside Ryan Harrison, but they lost to David Rice and Sean Thornley in the first round. Reynolds partnered with Alex Bogomolov Jr., but they withdrew because of a plantar fasciitis injury contracted by Reynolds.
Teymuraz Gabashvili and Denys Molchanov defeated Michael Russell and Tim Smyczek 6–2, 7–5 in the final to win the title.
Grega Žemlja was the defending champion, but chose to compete in the 2013 Birmingham Championship instead.
Steve Johnson won the final 7–5, 7–5 against Ruben Bemelmans.
John-Patrick Smith was the defending champion but decided not to participate. Jack Sock won the title, beating Bradley Klahn 6–4, 6–2.
Alexandr Dolgopolov was the defending champion, but lost to Indian qualifier Somdev Devvarman in the second round.
This was the first edition of the event.
Jack Sock was the defending champion but decided to participate at the 2013 Shanghai Rolex Masters instead. Peter Polansky won the title over 3rd seed Matthew Ebden 7–5, 6–3 to win his first Challenger title.
Denis Kudla was the defending champion but chose not to compete.
Michael Russell defeated Peter Polansky in the singles final, 7–5, 2–6, 7–6(7–5).
Michael Russell was the defending champion, but retired against Tennys Sandgren in the quarterfinals.
Top seed Tim Smyczek won the title defeating unseeded Canadian Peter Polansky in the final.
Tim Smyczek was the defending champion but lost to Erik Crepaldi in the first round.
Unseeded American Tennys Sandgren won the title defeating Australian 7th seed Samuel Groth 3–6, 6–3, 7–6(7–5).
Go Soeda was the two-time defending champion but chose not to compete.
Alex Kuznetsov was the defending champion, but lost in the first round to Hidalgo.
Ryan Harrison was the defending champion, but did not participate.
Bobby Reynolds and John-Patrick Smith were the defending champions, but Reynolds chose not to participate. Smith partnered with Adam Hubble and lost in the quarterfinals to Alex Kuznetsov and Nils Langer.
Lleyton Hewitt was the defending champion, but chose to participate in the Davis Cup quarterfinals instead.
Rajeev Ram won the title, defeating Ivo Karlović in the final, 7–6(7–5), 5–7, 7–6(7–2).
Sam Querrey was the defending champion, but lost in the quarterfinals to Juan Martín del Potro.
Nick Kyrgios was the defending champion, but withdrew before the tournament began.
Marin Čilić defeated Novak Djokovic in the final, 5–7, 7–6(7–4), 6–3 to win the singles tennis title at the 2018 Queen's Club Championships. He saved a championship point in the second set. This was Djokovic's first ATP Tour final in almost a year, and Čilić's second victory over Djokovic in their 16 matches played.