| Challenger Tenerife | 02/05 10:00 | 25 |
[319] Johannus Monday v
Eliot Spizzirri
[192]
|
6-2,6-4 | |
| ITF M25 Sunderland | 01/26 10:00 | - |
[429] Ryan Peniston
v
Johannus Monday [364] |
4-6,2-6 | |
| ITF M25 Sunderland | 01/25 10:00 | - | [364] Johannus Monday v Dennis Novak [351] | 6-4,5-3 | |
| ITF M25 Sunderland | 01/24 10:00 | - | [452] Alessandro Pecci v Johannus Monday [364] | 4-6,2-6 | |
| ITF M25 Sunderland | 01/23 10:00 | - | Phoenix Weir v Johannus Monday | 0-6,4-6 | |
| ITF M25 Sunderland | 01/21 13:44 | - | Alexander Maggs v Johannus Monday | 0-6,3-6 | |
| Challenger Nottingham | 01/08 14:15 | 26 |
[374] Johannus Monday v
Chris Rodesch
[299]
|
4-6,6-7 | |
| Challenger Nottingham | 01/06 16:00 | 25 |
[374] Johannus Monday v
Ryan Peniston
[427]
|
2-6,7-5,6-3 | |
| Challenger Knoxville | 11/09 17:00 | 28 |
[416] Johannus Monday v
Christopher Eubanks
[118]
|
6-7,6-4,6-7 | |
| Challenger Knoxville | 11/08 17:00 | 27 |
[416] Johannus Monday v
James Trotter
[198]
|
6-4,7-6 | |
| Challenger Knoxville | 11/07 18:50 | 26 |
[182] Patrick Kypson
v
Johannus Monday [416] |
6-3,3-6,6-7 | |
| Challenger Knoxville | 11/05 22:30 | 25 |
Nicolas Mejia
v
Johannus Monday |
6-3,4-6,3-6 | |
| ITF M25 Norman | 10/27 15:00 | 29 |
[315] Juan Carlos Aguilar
v
Johannus Monday [489] |
1-6,3-6 | |
| ITF M25 Norman | 10/26 14:50 | 28 |
Johannus Monday v
Stefan Dostanic
|
6-2,6-4 | |
| ITF M25 Norman | 10/25 16:55 | 27 | Johannus Monday v Sebastian Dominko | 6-0,7-6 | |
| ITF M25 Norman | 10/24 14:50 | 26 |
Trevor Svajda
v
Johannus Monday |
4-6,4-6 | |
| ITF M25 Norman | 10/23 15:00 | 25 |
Karl Poling
v
Johannus Monday |
1-6,7-6,1-6 | |
| ITF M25 Harlingen | 10/20 17:00 | 29 | Johannus Monday v Tadeas Paroulek | 6-0,6-1 | |
| ITF M25 Harlingen | 10/19 19:05 | 28 | Aidan Kim v Johannus Monday | 4-6,4-6 | |
| ITF M25 Harlingen | 10/18 17:05 | 27 | Garrett Johns v Johannus Monday | 4-6,1-6 | |
| ITF M25 Harlingen | 10/17 19:35 | 26 |
Alan Magadan
v
Johannus Monday |
4-6,1-6 | |
| ITF M25 Harlingen | 10/16 19:00 | 25 |
Ipora EC
v
Johannus Monday |
3-6,6-3,1-6 | |
| ITF M25 Louisville | 10/13 17:00 | 29 | Johannus Monday v Tyler Zink | 6-2,6-3 | |
| ITF M25 Louisville | 10/12 17:00 | 28 | Aidan Mchugh v Johannus Monday | 4-6,6-4,1-6 | |
| ITF M25 Louisville | 10/12 14:00 | 26 | Alex Martinez v Johannus Monday | Cancelled | |
| ITF M25 Louisville | 10/11 16:20 | 27 | Johannus Monday v Keshav Chopra | 6-2,6-4 | |
| ITF M25 Louisville | 10/10 14:00 | 26 | Sebastian Dominko v Johannus Monday | 2-6,3-6 | |
| ITF M25 Louisville | 10/09 17:35 | 25 |
Johannus Monday v
Evan Zhu
|
6-3,6-1 | |
| Challenger Charleston | 09/23 18:35 | 25 |
Johannus Monday v
Abedallah Shelbayh
|
5-7,3-6 | |
| Challenger Las Vegas | 09/10 00:00 | 25 | Johannus Monday v Denis Kudla | 6-7,3-6 |
Johannus Monday (born 22 January 2002) is a British tennis player. He has a career high singles ranking of No. 212, achieved on 27 October 2025. He has a career high doubles ranking of No. 192 achieved on 28 August 2023.
After winning the title of the men's doubles of the Nottingham Open alongside Jacob Fearnley, the pair received wildcards for the 2023 Wimbledon Championships. He was also given a wildcard into the men's qualifying singles and beat Mili Poljicak before pushing the experienced Radu Albot to three sets. In the doubles, he and Fearnley beat Andre Goransson and Ben McLachlan in the opening round before losing to Matthew Ebden and Rohan Bopanna.
He won three consecutive singles titles on the ITF tennis tour in October 2024. His haul included the singles and doubles titles at the M25 Louisville, a singles victory in Norman, Oklahoma, and a singles victory in Harlingen, Texas.
He began 2025 with another title at that level in Sunderland before adding a fifth in six months in Bakersfield, United States in March 2025, defeating American Alex Rybakov in the final in straight sets to seal the title.
In June 2025, Monday was awarded a wildcard to make his major tournament main-draw singles debut at Wimbledon, where he lost to 13th seed Tommy Paul in the first round.
In September 2025, Monday combined with Patrick Harper to win the doubles title at the Columbus Challenger, defeating George Goldhoff and Theodore Winegar in the final.