30.07.21 | 1/2 | Alexander Erler/Lucas Miedler | Tomislav Brkic/Nikola Cacic | 1-6, 6-1, 12-10 | | match details | Kitzbuhel | Clay |
28.07.21 | 1/4 | Tomislav Brkic/Nikola Cacic | Rafael Matos/Andrei Vasilevski | 7-66, 2-6, 10-8 | | match details |
27.07.21 | 1st round | Tomislav Brkic/Nikola Cacic | David Pel/Arthur Rinderknech | 6-2, 6-3 | | match details |
24.07.21 | fin | Fernando Romboli/David Vega Hernandez | Tomislav Brkic/Nikola Cacic | 6-3, 7-5 | | match details | Umag | Clay |
23.07.21 | 1/2 | Tomislav Brkic/Nikola Cacic | Ivan Sabanov/Matej Sabanov | 6-1, 6-2 | | match details |
22.07.21 | 1/4 | Tomislav Brkic/Nikola Cacic | Roman Jebavy/Jiri Vesely | 6-2, 6-2 | | match details |
21.07.21 | 1st round | Tomislav Brkic/Nikola Cacic | Duje Ajdukovic/Frane Nincevic | 6-4, 3-6, 10-8 | | match details |
14.07.21 | 1st round | Andrey Golubev/Aleksandr Nedovyesov | Tomislav Brkic/Nikola Cacic | 6-3, 7-65 | | match details | Hamburg | Clay |
08.06.21 | 1/4 | Pierre-Hugues Herbert/Nicolas Mahut | Tomislav Brkic/Nikola Cacic | 7-65, 6-1 | | match details | Paris | Clay |
05.06.21 | 3rd round | Tomislav Brkic/Nikola Cacic | Simone Bolelli/Maximo Gonzalez | 6-4, 6-4 | | match details |
03.06.21 | 2nd round | Tomislav Brkic/Nikola Cacic | Marcel Granollers/Horacio Zeballos | 6-3, 3-6, 6-3 | | match details |
02.06.21 | 1st round | Tomislav Brkic/Nikola Cacic | Alexei Popyrin/Jordan Thompson | 7-5, 6-74, 6-3 | | match details |
23.05.21 | 1st round | Ivan Sabanov/Matej Sabanov | Tomislav Brkic/Nikola Cacic | 4-6, 6-3, 10-8 | | match details | Belgrade | Clay |
20.05.21 | 1/4 | Simone Bolelli/Maximo Gonzalez | Tomislav Brkic/Nikola Cacic | 6-3, 7-67 | | match details | Geneva | Clay |
19.05.21 | 1st round | Tomislav Brkic/Nikola Cacic | Oliver Marach/Mate Pavic | 7-66, 6-2 | | match details |
28.04.21 | 1st round | Matthew Ebden/John-Patrick Smith | Tomislav Brkic/Nikola Cacic | 7-63, 7-65 | | match details | Munich | Clay |
23.04.21 | 1/2 | Ariel Behar/Gonzalo Escobar | Tomislav Brkic/Nikola Cacic | 6-3, 6-4 | | match details | Belgrade | Clay |
22.04.21 | 1/4 | Tomislav Brkic/Nikola Cacic | Simone Bolelli/Maximo Gonzalez | 0-6, 7-67, 10-8 | | match details |
21.04.21 | 1st round | Tomislav Brkic/Nikola Cacic | Marcelo Arevalo/Matwe Middelkoop | 6-4, 7-65 | | match details |
17.04.21 | fin | Guillermo Duran/Andres Molteni | Tomislav Brkic/Nikola Cacic | 6-4, 6-4 | | match details | Belgrade Challenger | Clay |
16.04.21 | 1/2 | Tomislav Brkic/Nikola Cacic | Facundo Bagnis/Francisco Cerundolo | 6-0, 7-66 | | match details |
15.04.21 | 1st round | Tomislav Brkic/Nikola Cacic | Viktor Troicki/Miljan Zekic | 6-4, 6-2 | | match details |
15.04.21 | 1/4 | Tomislav Brkic/Nikola Cacic | Roman Jebavy/Igor Zelenay | 7-66, 6-3 | | match details |
11.04.21 | fin | Ariel Behar/Gonzalo Escobar | Tomislav Brkic/Nikola Cacic | 6-2, 6-4 | | match details | Marbella | Clay |
09.04.21 | 1/2 | Tomislav Brkic/Nikola Cacic | Marcelo Arevalo/Matwe Middelkoop | 6-4, 6-4 | | match details |
07.04.21 | 1/4 | Tomislav Brkic/Nikola Cacic | Marcus Daniell/Philipp Oswald | 4-6, 7-65, 11-9 | | match details |
06.04.21 | 1st round | Tomislav Brkic/Nikola Cacic | Sander Arends/David Pel | 1-6, 6-0, 10-5 | | match details |
10.03.21 | 1st round | Simone Bolelli/Maximo Gonzalez | Tomislav Brkic/Nikola Cacic | 7-67, 6-3 | | match details | Santiago | Clay |
07.03.21 | fin | Tomislav Brkic/Nikola Cacic | Ariel Behar/Gonzalo Escobar | 6-3, 7-5 | | match details | Buenos Aires | Clay |
05.03.21 | 1/2 | Tomislav Brkic/Nikola Cacic | Dominik Koepfer/Joao Sousa | 3-6, 7-65, 10-5 | | match details |
04.03.21 | 1/4 | Tomislav Brkic/Nikola Cacic | Andre Goransson/Thiago Moura Monteiro | Andre Goransson/Thiago Moura Monteiro - walk over | | match details |
03.03.21 | 1st round | Tomislav Brkic/Nikola Cacic | Roberto Carballes Baena/Salvatore Caruso | 6-3, 6-4 | | match details |
25.02.21 | 1st round | Facundo Bagnis/Maximo Gonzalez | Tomislav Brkic/Nikola Cacic | 7-5, 7-65 | | match details | Cordoba | Clay |