for players who have been registered with, or on loan to Watford whilst representing their country
Last update: 03/07/2026
| Match Date | Player 1 (Country) | Player 2 (Country) | Relationship |
|---|---|---|---|
| 02/06/2026 | Giorgi Chakvetadze (Georgia) | Saba Goglichidze (Georgia) | Teammates |
| 16/11/2023 | Ryan Porteous (Scotland) | Giorgi Chakvetadze (Georgia) | Opponents |
| 26/03/2023 | Leandro Bacuna (Curaçao) | Ismaël Koné (Canada) | Opponents |
| 09/06/2022 | William Troost-Ekong (Nigeria) | Kamil Conteh (Sierra Leone) | Opponents |
| 03/06/2022 | William Troost-Ekong (Nigeria) | Emmanuel Dennis (Nigeria) | Teammates |
| 29/03/2022 | Adam Masina (Morocco) | Edo Kayembe (DR Congo) | Opponents |
| 29/03/2022 | Peter Etebo (Nigeria) | Emmanuel Dennis (Nigeria) | Teammates |
| 29/03/2022 | William Troost-Ekong (Nigeria) | Emmanuel Dennis (Nigeria) | Teammates |
| 29/03/2022 | William Troost-Ekong (Nigeria) | Peter Etebo (Nigeria) | Teammates |
| 25/03/2022 | Adam Masina (Morocco) | Edo Kayembe (DR Congo) | Opponents |
| 25/03/2022 | Imrân Louza (Morocco) | Edo Kayembe (DR Congo) | Opponents |
| 25/03/2022 | Adam Masina (Morocco) | Imrân Louza (Morocco) | Teammates |
| 25/03/2022 | Peter Etebo (Nigeria) | Emmanuel Dennis (Nigeria) | Teammates |
| 25/03/2022 | William Troost-Ekong (Nigeria) | Emmanuel Dennis (Nigeria) | Teammates |
| 25/03/2022 | William Troost-Ekong (Nigeria) | Peter Etebo (Nigeria) | Teammates |
| 30/01/2022 | Adam Masina (Morocco) | Imrân Louza (Morocco) | Teammates |
| 25/01/2022 | Adam Masina (Morocco) | Imrân Louza (Morocco) | Teammates |
| 23/01/2022 | William Troost-Ekong (Nigeria) | Maduka Okoye (Nigeria) | Teammates |
| 15/01/2022 | William Troost-Ekong (Nigeria) | Maduka Okoye (Nigeria) | Teammates |
| 14/01/2022 | Adam Masina (Morocco) | Imrân Louza (Morocco) | Teammates |
| 11/01/2022 | William Troost-Ekong (Nigeria) | Maduka Okoye (Nigeria) | Teammates |
| 10/01/2022 | Adam Masina (Morocco) | Imrân Louza (Morocco) | Teammates |
| 16/11/2021 | Adam Masina (Morocco) | Imrân Louza (Morocco) | Teammates |
| 12/11/2021 | Adam Masina (Morocco) | Imrân Louza (Morocco) | Teammates |
| 09/10/2021 | Adam Masina (Morocco) | Imrân Louza (Morocco) | Teammates |
| 06/10/2021 | Adam Masina (Morocco) | Imrân Louza (Morocco) | Teammates |
| 03/09/2021 | William Troost-Ekong (Nigeria) | Peter Etebo (Nigeria) | Teammates |
| 26/03/2021 | Bayli Spencer-Adams (Guyana) | Daniel Phillips (Trinidad and Tobago) | Opponents |
| 12/10/2018 | Craig Cathcart (Northern Ireland) | Sebastian Prödl (Austria) | Opponents |
| 06/09/2018 | Sebastian Prödl (Austria) | Ken Sema (Sweden) | Opponents |
| 05/09/2017 | Nordin Amrabat (Morocco) | Molla Wagué (Mali) | Opponents |
| 01/09/2017 | Nordin Amrabat (Morocco) | Molla Wagué (Mali) | Opponents |
| 31/05/2017 | Steven Berghuis (Netherlands) | Nordin Amrabat (Morocco) | Opponents |
| 15/11/2016 | Juan Carlos Paredes (Ecuador) | Adalberto Peñaranda (Venezuela) | Opponents |
| 06/09/2016 | Steven Berghuis (Netherlands) | Daryl Janmaat (Netherlands) | Teammates |
| 01/09/2016 | José Holebas (Greece) | Steven Berghuis (Netherlands) | Opponents |
| 14/06/2016 | Miguel Layún (Mexico) | Adalberto Peñaranda (Venezuela) | Opponents |
| 04/06/2016 | Sebastian Prödl (Austria) | Steven Berghuis (Netherlands) | Opponents |
| 29/03/2016 | Daniel Pudil (Czech Republic) | Matej Vydra (Czech Republic) | Teammates |
| 24/03/2016 | Ikechi Anya (Scotland) | Daniel Pudil (Czech Republic) | Opponents |
| 24/03/2016 | Ikechi Anya (Scotland) | Matej Vydra (Czech Republic) | Opponents |
| 24/03/2016 | Daniel Pudil (Czech Republic) | Matej Vydra (Czech Republic) | Teammates |
| 17/11/2015 | Sebastian Prödl (Austria) | Valon Behrami (Switzerland) | Opponents |
| 08/10/2015 | Craig Cathcart (Northern Ireland) | José Holebas (Greece) | Opponents |
| 29/03/2015 | Juan Carlos Paredes (Ecuador) | Miguel Layún (Mexico) | Opponents |
| 07/09/2014 | Craig Cathcart (Northern Ireland) | Dániel Tozsér (Hungary) | Opponents |
| 03/09/2014 | Daniel Pudil (Czech Republic) | Matej Vydra (Czech Republic) | Teammates |
| 13/06/2012 | Adrian Mariappa (Jamaica) | Nyron Nosworthy (Jamaica) | Teammates |
| 09/06/2012 | Adrian Mariappa (Jamaica) | Nyron Nosworthy (Jamaica) | Teammates |
| 19/05/2012 | Adrian Mariappa (Jamaica) | Nyron Nosworthy (Jamaica) | Teammates |
| 24/05/2011 | Lee Hodson (Northern Ireland) | Adam Thompson (Northern Ireland) | Teammates |
| 09/02/2011 | Lee Hodson (Northern Ireland) | Adam Thompson (Northern Ireland) | Teammates |
| 26/03/2005 | Brynjar Gunnarsson (Iceland) | Heidar Helguson (Iceland) | Teammates |
| 13/10/2004 | Brynjar Gunnarsson (Iceland) | Heidar Helguson (Iceland) | Teammates |
| 09/10/2004 | Brynjar Gunnarsson (Iceland) | Heidar Helguson (Iceland) | Teammates |
| 04/09/2004 | Brynjar Gunnarsson (Iceland) | Heidar Helguson (Iceland) | Teammates |
| 18/08/2004 | Brynjar Gunnarsson (Iceland) | Heidar Helguson (Iceland) | Teammates |
| 02/09/2000 | Heidar Helguson (Iceland) | Allan Nielsen (Denmark) | Opponents |
| 09/10/1999 | Peter Kennedy (Northern Ireland) | Mark Williams (Northern Ireland) | Teammates |
| 08/09/1999 | Peter Kennedy (Northern Ireland) | Mark Williams (Northern Ireland) | Teammates |
| 04/09/1999 | Peter Kennedy (Northern Ireland) | Mark Williams (Northern Ireland) | Teammates |
| 18/08/1999 | Peter Kennedy (Northern Ireland) | Mark Williams (Northern Ireland) | Teammates |
| 27/04/1988 | Glyn Hodges (Wales) | Kenny Jackett (Wales) | Teammates |
| 11/11/1987 | Glyn Hodges (Wales) | Kenny Jackett (Wales) | Teammates |
| 14/10/1987 | Glyn Hodges (Wales) | Kenny Jackett (Wales) | Teammates |
| 19/05/1986 | Malcolm Allen (Wales) | Kenny Jackett (Wales) | Teammates |
| 10/05/1986 | Malcolm Allen (Wales) | Kenny Jackett (Wales) | Teammates |
| 25/02/1986 | Malcolm Allen (Wales) | Kenny Jackett (Wales) | Teammates |
| 27/02/1985 | John Barnes (England) | John McClelland (Northern Ireland) | Opponents |
| 26/05/1984 | John Barnes (England) | Mo Johnston (Scotland) | Opponents |
| 28/02/1984 | Kenny Jackett (Wales) | Mo Johnston (Scotland) | Opponents |
| 19/06/1983 | John Barnes (England) | Luther Blissett (England) | Teammates |
| 12/06/1983 | John Barnes (England) | Luther Blissett (England) | Teammates |
| 28/05/1983 | Gerry Armstrong (Northern Ireland) | John Barnes (England) | Opponents |
| 28/05/1983 | Gerry Armstrong (Northern Ireland) | Luther Blissett (England) | Opponents |
| 28/05/1983 | John Barnes (England) | Luther Blissett (England) | Teammates |
| 23/02/1983 | Luther Blissett (England) | Kenny Jackett (Wales) | Opponents |