Mamardashvili spent much of his youth years atDinamo Tbilisi. After signing a professional contract with this club, he was loaned to otherErovnuli Liga teams for three seasons before his transfer toValencia. He has quickly established himself as a first-choice shot-stopper, becoming the first everGeorgian goalkeeper in theSpanish top tier.
Born inTbilisi, Mamardashvili joinedDinamo Tbilisi's youth setup in 2012, fromGagra.[5] After featuring as an unusedsubstitute in the first team for most of the 2018 season, he was loaned toRustavi for the 2019 campaign.
Mamardashvili made his senior debut on 2 March 2019, starting in a 4–1 away loss againstLocomotive Tbilisi.[6] After contributing with 28 appearances and helping his side to avoid relegation, he made another loan move toLocomotive Tbilisi.
Mamardashvili was hailed during Locomotive'sUEFA Europa League campaign in 2020. According to newspaperMarca, his performance againstGranada drew attention from Spanish scouts.[7]
On 7 June 2021, Mamardashvili joinedLa Liga clubValencia on a one-year loan deal, with a buyout clause, and was initially assigned tothe reserves inTercera División RFEF.[10][11] He made the pre-season with the main squad, impressing managerJosé Bordalás[12] and earning himself the starting spot in the league opener againstGetafe on 13 August, which ended 1–0 forLos Che.[13]
On 31 December 2021, Valencia confirmed the permanent signing of Mamardashvili on a contract until 2024, with an option for a further year.[14]
During that season, Mamardashvili participated in 18 league matches and kept eight clean sheets. He recorded 560 minutes in a row without conceding a goal.[15] He was twice included in La Liga's symbolic team of the week (Matchweeks 1 and 35). Additionally, he received theplayer of the match award on three occasions.[16] In May 2022,Marca named Mamardashvili in the La Liga's Discovery of the Season team.[17]
The next season Mamardashvili took part in all 38 league games without being substituted. He was selected in La Liga's team of the week three times.[18] Based on votes from Valencia fans, Mamardashvili was named the best player in 2023, while he had come 2nd behindGonçalo Guedes the previous year.[19]
On 28 January 2024, Mamardashvili became part of club history. He broke the team record with his 60th consecutive appearance in La Liga as a starter.[20] Eventually, he played in 69 league matches in a row. Overall, during his third season at the club Mamardashvili continued to achieve impressive results, namely, improving his clean sheet record (13), saving the most penalties (3) along withUnai Simon and preventing the most goals in La Liga.[21]
Based on his performances this season, Mamardashvili was nominated for the Yashin trophy annually awarded byFrance Football to the best goalkeeper in world football.[22] At theBallon d'Or ceremony held inParis on 28 October 2024, he took seventh place.
On 27 August 2024, Valencia andPremier League clubLiverpool confirmed that Mamardashvili would be joining the latter at the start of the 2025–26 season, becoming the first Georgian to play for the club.[23][24]On 23 September 2025, he made his debut for Liverpool in a 2–1 win againstSouthampton in theEFL Cup third round.[25]
On 9 June 2022, he played his first official match in a 3–0 win overNorth Macedonia in the2022–23 UEFA Nations League.[27] For his performance in the return leg (2–0) in September, Mamardashvili was named in Team of the Week after round 5,[28][29] andwhoscored.com included him in monthly and seasonal Best XI ofLeague C.[30]
In the summer of 2023, Mamardashvili took part in three games inUEFA European Under-21 Championship forGeorgia U21s, who had a highly successful group stage campaign and reached quarter-finals for the first time in their history.[31]
On 26 March 2024, Georgia defeatedGreece 4–2 in apenalty shoot-out in theplay-off final to qualify forUEFA Euro 2024, the nation's first ever major international tournament. Mamardashvili was a critical factor in this game, saving the first spot kick from Greek forwardAnastasios Bakasetas.
Mamardashvili was selected by Georgia for the Euro 2024 finals in Germany.[32] He started in his side's first match in a major competition, a 3–1 loss againstTurkey on 19 June.[33] After making eleven saves in the next game against theCzech Republic, Mamardashvili received the player of the match award.[34] Analytical sites such asSofascore,Marca and90min.com named him in the team of match day 2, with the former awarding him the second highest aggregate rating point after Spanish midfielderFabián Ruiz.[35][36][37] In the team's thirdGroup F match, Mamardashvili kept a clean sheet againstPortugal, as Georgia won 2–0 to qualify for theknockout stage.[38] He ended the group stage having made 20 saves, seven more than any other goalkeeper at the tournament.[39]
Mamardashvili is the son of formerWIT Georgia andTorpedo Kutaisi goalkeeper Davit Mamardashvili, who after retirement became a goalkeeping coach atMerani Martvili and later Torpedo Kutaisi.[40]
Mamardashvili started a relationship with model Elene Epitashvili in 2021. The couple married on 18 July 2024. On 22 November 2024, their daughter Eni was born.[41][42]
^"გაგრელი მწვრთნელის ხსოვნას ტურნირი მიეძღვნა" [The tournament was dedicated to the memory of Gagreli coach].worldsport.ge (in Georgian). 27 October 2010.Archived from the original on 15 September 2021. Retrieved15 September 2021.