Struff Jan-Lennard - Monteiro Thiago Moura
6-3 6-4
| Date | Tournament | Surface | Opponent | W/L | Score | |
|---|---|---|---|---|---|---|
| Jul 13, 2021 | Hamburg | clay | Djere Laslo | L | 4-6 5-7 | |
| Jun 29, 2021 | Wimbledon | grass | Medvedev Daniil | L | 4-6 1-6 6-4 6-7 | |
| Jun 20, 2021 | Mallorca | grass | Mannarino Adrian | L | 6-7 3-6 | |
| Jun 16, 2021 | Halle | grass | Giron Marcos | L | 7-6 3-6 4-6 | |
| Jun 15, 2021 | Halle | grass | Medvedev Daniil | W | 7-6 6-3 | |
| Jun 07, 2021 | French Open | clay | Schwartzman Diego | L | 6-7 4-6 5-7 | |
| Jun 05, 2021 | French Open | clay | Alcaraz Carlos | W | 6-4 7-6 6-2 | |
| Jun 03, 2021 | French Open | clay | Bagnis Facundo | W | 7-5 7-6 6-4 | |
| Jun 01, 2021 | French Open | clay | Rublev Andrey | W | 6-3 7-6 4-6 3-6 6-4 | |
| May 27, 2021 | Parma | clay | Paul Tommy | L | 2-6 4-6 | |
| May 26, 2021 | Parma | clay | Cobolli Flavio | W | 6-4 4-6 7-6 | |
| May 12, 2021 | Rome | clay | Rublev Andrey | L | 7-6 1-6 4-6 | |
| May 10, 2021 | Rome | clay | Bedene Aljaz | W | 6-3 6-1 | |
| May 04, 2021 | Madrid - Masters | clay | Popyrin Alexei | L | 3-6 6-7 | |
| May 02, 2021 | Munich | clay | Basilashvili Nikoloz | L | 4-6 6-7 | |
| May 01, 2021 | Munich | clay | Ivashka Ilya | W | 6-4 6-1 | |
| Apr 30, 2021 | Munich | clay | Krajinovic Filip | W | 6-4 4-6 7-6 | |
| Apr 29, 2021 | Munich | clay | Koepfer Dominik | W | 7-6 6-7 6-2 | |
| Apr 27, 2021 | Munich | clay | Martin Andrej | W | 6-4 6-3 | |
| Apr 13, 2021 | Monte Carlo | clay | Dimitrov Grigor | L | 3-6 4-6 | |
| Apr 09, 2021 | Cagliari | clay | Basilashvili Nikoloz | L | 5-7 6-4 3-6 | |
| Apr 07, 2021 | Cagliari | clay | Broady Liam | W | 6-4 6-2 | |
| Apr 06, 2021 | Cagliari | clay | Sousa Joao | W | 1-6 6-1 7-5 | |
| Mar 28, 2021 | Miami | hard | Bautista-Agut Roberto | L | 6-4 3-6 2-6 | |
| Mar 26, 2021 | Miami | hard | Berankis Ricardas | W | 6-3 6-4 | |
| Mar 16, 2021 | Dubai | hard | Shapovalov Denis | L | 1-6 3-6 | |
| Mar 15, 2021 | Dubai | hard | Kukushkin Mikhail | W | 6-3 6-2 | |
| Mar 03, 2021 | Rotterdam | indoors | Goffin David | L | 4-6 0-6 | |
| Feb 23, 2021 | Montpellier | indoors | Gojowczyk Peter | L | 3-6 4-6 | |
| Feb 09, 2021 | Australian Open | hard | O'Connell Christopher | L | 6-7 6-7 1-6 | |
| Feb 06, 2021 | ATP Cup | hard | Rublev Andrey | L | 6-3 1-6 2-6 | |
| Feb 05, 2021 | ATP Cup | hard | Lajovic Dusan | W | 3-6 6-3 6-4 | |
| Feb 03, 2021 | ATP Cup | hard | Raonic Milos | W | 7-6 7-6 |
| Date | Tournament | Surface | Opponent | W/L | Score | |
|---|---|---|---|---|---|---|
| Jul 12, 2021 | Bastad | clay | Hanfmann Yannick | L | 2-6 5-7 | |
| Jun 30, 2021 | Wimbledon | grass | Auger Aliassime Felix | L | 3-6 3-6 3-6 | |
| Jun 02, 2021 | French Open | clay | Johnson Steve | L | 3-6 7-6 6-7 6-3 3-6 | |
| May 31, 2021 | French Open | clay | Cerundolo Francisco | W | 6-3 6-4 6-3 | |
| May 26, 2021 | Belgrade 2 | clay | Delbonis Federico | L | 6-7 6-3 4-6 | |
| May 24, 2021 | Belgrade 2 | clay | Albot Radu | W | 6-2 6-2 | |
| May 18, 2021 | Geneva | clay | Djere Laslo | L | 7-6 3-6 5-7 | |
| May 09, 2021 | Rome | clay | Paul Tommy | L | 5-7 6-4 6-7 | |
| May 08, 2021 | Rome | clay | Kukushkin Mikhail | W | 7-6 7-6 | |
| May 01, 2021 | Madrid - Masters | clay | Giron Marcos | L | 4-6 7-6 6-7 | |
| Apr 27, 2021 | Munich | clay | Basilashvili Nikoloz | L | 2-6 3-6 | |
| Apr 19, 2021 | Barcelona | clay | Munar Jaume | L | 3-6 5-7 | |
| Apr 10, 2021 | Monte Carlo | clay | Sousa Joao | L | 5-7 2-6 | |
| Mar 03, 2021 | Buenos Aires | clay | Kecmanovic Miomir | L | 7-5 3-6 4-6 | |
| Mar 02, 2021 | Buenos Aires | clay | Carballes Baena Roberto | W | 6-2 6-3 | |
| Feb 26, 2021 | Cordoba | clay | Cerundolo Juan Manuel | L | 2-6 6-2 3-6 | |
| Feb 25, 2021 | Cordoba | clay | Carballes Baena Roberto | W | 6-3 6-4 | |
| Feb 24, 2021 | Cordoba | clay | Menezes Joao | W | 6-3 6-3 | |
| Feb 11, 2021 | Australian Open | hard | Rublev Andrey | L | 4-6 4-6 6-7 | |
| Feb 09, 2021 | Australian Open | hard | Martin Andrej | W | 7-6 6-1 6-2 | |
| Feb 06, 2021 | Great Ocean Road Open | hard | Travaglia Stefano | L | 3-6 4-6 | |
| Feb 05, 2021 | Great Ocean Road Open | hard | Thompson Jordan | W | 6-4 6-4 | |
| Feb 05, 2021 | Great Ocean Road Open | hard | Alcaraz Carlos | W | 7-6 6-3 | |
| Feb 03, 2021 | Great Ocean Road Open | hard | Ebden Matthew | W | 6-7 6-4 6-3 | |
| Feb 02, 2021 | Great Ocean Road Open | hard | Fancutt Thomas John | W | 6-4 6-4 |