Damián Emiliano Martínez Romero (born 2 September 1992) is an Argentine professional footballer who plays as a goalkeeper for Premier League club Aston Villa.
After injuries to Ryan Clarke and Wayne Brown, and the termination of Connor Ripley’s loan, Martínez went on emergency loan to Oxford United, making his debut in the English Football League in their final game of the season against Port Vale in League Two on 5 May 2012; Port Vale won 3–0. Later that year, Martinez was named on the Arsenal substitute bench for their fixtures away at Stoke City on 26 August and against Liverpool on 2 September, as cover for the injured Wojciech Szczęsny and Łukasz Fabiański, respectively. On 26 September, he made his Arsenal debut in a 6–1 home win against Coventry City in the third-round of the League Cup. He made his second Arsenal appearance in the following round in a 7–5 win away at Reading. Martínez subsequently transferred to Championship side Sheffield Wednesday on an emergency 28-day loan on 15 October 2013. He made his debut for Wednesday on 23 November, against Yorkshire rivals Huddersfield Town. Martínez’s loan was eventually extended until the end of the season.
On 16 September 2020, Martínez transferred to fellow Premier League club Aston Villa in a deal worth up to £20 million. He signed a four-year deal. On 21 September, Martínez made his debut for Villa, saving a penalty from John Lundstram in a 1–0 home win against Sheffield United.
Martínez was called up to the Argentina senior squad to replace Óscar Ustari to face Nigeria in June 2011. He received his second senior call up against Germany and Ecuador on 9 and 13 October 2019; he was an unused substitute for both friendly matches.
Martínez signed a sponsorship deal with Puma in 2018.