Istanbul 4 challenger · ATP
Istanbul 4 challenger 2026
ChallengerClayIstanbul, Türkiye17 May – 23 May 2026Prize money: 107,000 USD49 matchesAltitude: 32 mCourt: Medium-slow
Champion David Jorda Sanchis · Final: 6-2 6-4
Final rounds
| Final | David Jorda Sanchis vs Andrej Nedic | 6-4 6-4 |
| Semifinal | David Jorda Sanchis vs Hynek Barton | 6-3 6-7(4) 6-1 |
| Semifinal | Andrej Nedic vs Franco Agamenone | 6-4 6-2 |
| Quarterfinal | Hynek Barton vs Daniel Michalski | 6-3 6-4 |
| Quarterfinal | Andrej Nedic vs Mili Poljicak | 6-1 6-2 |
| Quarterfinal | Franco Agamenone vs Thiago Monteiro | 6-2 6-3 |
| Quarterfinal | David Jorda Sanchis vs Nikolas Sanchez Izquierdo | 6-2 6-4 |
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