title: Mattias Siimar
text: # Mattias Siimar
  
  Mattias Siimar (born 3 February 1998) is an Estonian tennis player.
  
  Siimar has a career high ATP singles ranking of 1036, achieved on 25 October 2021.
  
  Playing for Estonia in Davis Cup, Siimar has a win–loss record of 5–6. His twin brother Kristofer Siimar is also a tennis player.
  
  ## ITF World Tennis Tour and Challenger finals
  
  ### Singles: 1 (0–1)
  
  * Legend (singles)
  * ATP Challenger Tour (0–0)
  * ITF World Tennis Tour (0–1)
  * Titles by surface
  * Hard (0–0)
  * Clay (0–1)
  * Grass (0–0)
  * Carpet (0–0)
  
  | Result | W–L | Date | Tournament | Tier | Surface | Opponent | Score |
  | - | - | - | - | - | - | - | - |
  | Loss | 0–1 | Aug 2021 | M15 Pärnu, Estonia | World Tennis Tour | Clay | Ergi Kırkın | 7–5, 3–6, 3–6 |
  
  ## Davis Cup
  
  ### Participations: (5–6)
  
  * Group membership
  * World Group (0–0)
  * WG play-off (0–0)
  * Group I (0–0)
  * Group II (2–6)
  * Group III (3–0)
  * Group IV (0–0)
  * Matches by surface
  * Hard (4–6)
  * Clay (1–0)
  * Grass (0–0)
  * Carpet (0–0)
  * Matches by type
  * Singles (0–3)
  * Doubles (5–3)
  * indicates the outcome of the Davis Cup match followed by the score, date, place of event, the zonal classification and its phase, and the court surface.
  
  | Rubber outcome | No. | Rubber | Match type (partner if any) | Opponent nation | Opponent player(s) | Score |
  | - | - | - | - | - | - | - |
  | 3–0; 17 July 2015; City of San Marino, San Marino; Europe Zone Group III round robin; clay surface |||||||
  | Victory | 1 | III | Doubles (with Kenneth Raisma) (dead rubber) | Montenegro | Rrezart Cungu / Ivan Saveljić | 6–1, 6–2 |
  | 3–0; 3 March 2016; Tere Tennis Centre, Tallinn, Europe Zone Group III round robin; hard (indoor) surface |||||||
  | Victory | 2 | III | Doubles (with Jürgen Zopp) (dead rubber) | Kosovo | Granit Bajraliu / Gurash Hasani | 6–1, 6–1 |
  | 3–0; 4 March 2016; Tere Tennis Centre, Tallinn, Estonia; Europe Zone Group III round robin; hard (indoor) surface |||||||
  | Victory | 3 | III | Doubles (with Jürgen Zopp) (dead rubber) | Greece | Christos Antonopoulos / Vasileios Iliopoulos | 6–0, 6–1 |
  | 1–4; 3-5 February 2017; Irene Country Club, Centurion, South Africa; Europe/Africa Zone Group II first round; hard surface |||||||
  | Defeat | 4 | III | Doubles (with Kenneth Raisma) | South Africa | Raven Klaasen / Ruan Roelofse | $7–6^{(7–4)},$ 3–6, 4–6, 5–7 |
  | Defeat | 5 | IV | Singles (dead rubber) | South Africa | Lloyd Harris | 5–7, 3–6 |
  | 3–2; 7-9 April 2017; Tere Tennis Centre, Tallinn, Estonia; Europe/Africa Zone Group II relegation play-off; hard (indoor) surface |||||||
  | Victory | 6 | III | Doubles (with Kenneth Raisma) | Monaco | Romain Arneodo / Benjamin Balleret | 4–6, 6–1, 6–2, $7–6^{(9–7)}$ |
  | Defeat | 7 | IV | Singles (dead rubber) | Monaco | Lucas Catarina | 4–6, 6–4, $6–7^{(3–7)}$ |
  | 1–3; 3-4 February 2018; Šiauliai Tennis School, Šiauliai, Lithuania; Europe/Africa Zone Group II first round; hard (indoor) surface |||||||
  | Defeat | 8 | III | Doubles (with Kenneth Raisma) | Lithuania | Ričardas Berankis / Laurynas Grigelis | 6–2, 4–6, $6–7^{(4–7)}$ |
  | 2–1; 6-7 March 2020; Alex Metreveli Tennis Club, Tbilisi, Georgia; World Group II playoff first round; hard surface |||||||
  | Victory | 9 | III | Doubles (with Vladimir Ivanov) | Georgia | Aleksandre Metreveli / George Tsivadze | 3–6, 6–3, 6–3 |
  | 0–2; 17-18 September 2021; Jan Group Arena, Biel, Switzerland; World Group II first round; hard (indoor) surface |||||||
  | Defeat | 10 | II | Singles | Switzerland | Henri Laaksonen | 4–6, 0–6 |
  | Defeat | 11 | III | Doubles (with Vladimir Ivanov) | Switzerland | Marc-Andrea Hüsler / Dominic Stricker | 4–6, $6–7^{(4–7)}$ |
  