Alberto Undiano Mallenco (Spanish pronunciation: [alˈβeɾto wnˈdjano maˈʎeŋko]; born 6 October 1973) is a retired Spanish football referee. He was a full international referee for FIFA from 2004 to 2019. Undiano is also a part-time sociologist.

Mallenco was born in Pamplona.

On 8 May 2019, Mallenco refereed the 2018–19 Armenian Cup between Alashkert and Lori.^[1][2]

He refereed in La Liga from 2000 to 2019.

Undiano was selected as a referee for the 2007 FIFA U-20 World Cup in Canada, where he refereed the match between Canada and Chile on 1 July 2007. He also refereed the final match between Argentina and Czech Republic on 23 July 2007.

Undiano was selected as a referee for the 2010 FIFA World Cup in South Africa. He was the only Spanish referee at the 2010 FIFA World Cup.^[3] The group stage game between Germany and Serbia resulted in a 1–0 win for Serbia. Undiano gave a second yellow card to German player Miroslav Klose in the 36th minute, thus resulting in a red card. In the 59th minute Nemanja Vidić received a yellow card for handball, also resulting in a penalty. Undiano awarded yellow cards to Klose (2), Branislav Ivanović, Aleksandar Kolarov, Sami Khedira, Philipp Lahm, Neven Subotić, Bastian Schweinsteiger and Nemanja Vidić – a total of nine yellow cards.^{[4][citation needed]}

He refereed the 2019 UEFA Nations League Final. It was his last game as a professional referee.^[5]

• Don Balón Award (Best Spanish Referee) : 2005 and 2007

• List of football referees

Sporting positions Alberto Undiano Mallenco
Preceded by none	2019 UEFA Nations League Final Referee	Succeeded by Anthony Taylor

• Alberto Undiano at FIFA U-20 World Cup at the Wayback Machine (archived 14 June 2017)
• Alberto Undiano referee profile at Soccerway
• Alberto Undiano referee profile at EU-Football.info
• Alberto Undiano referee profile at WorldFootball.net
• Alberto Undiano refereeing career statistics at Soccerbase
• Alberto Undiano at WorldReferee.com