Serantes subsequently returned to Barakaldo in June 2009, and spent the following two seasons as a backup to Igor Etxebarrieta. On 19 January 2011, he signed a two-year contract with his former club Athletic to be made effective in July,[3] being assigned to the reserves.[4]
On 24 July 2013, Serantes returned to his hometown club in a season-long loan deal.[5] He appeared in all Segunda División B matches during his tenure, and was subsequently released by Athletic on 26 May 2014.[6]
Serantes played his first match as a professional on 23 November 2014, starting in a 1–0 away loss against CD Mirandés.[9]
Leganés
Serantes terminated his contract with the Galicians on 2 July 2015,[10] and joined Leganés on a two-year deal a day later.[11] He featured in all 42 games in the first season in his second spell, helping the club to reach La Liga for the first time in its 87-year history and finishing second in the Ricardo Zamora Trophy in the process.[12][13]
On 30 December 2018, Serantes moved abroad for the first time in his career, signing for Japan's Avispa Fukuoka after terminating his contract with Leganés.[18] He returned to Spain and its second division on 1 February 2021, on a six-month deal at CD Tenerife.[19]
^"El Girona ya tiene su premio" [Girona already have their award]. El Día de Córdoba (in Spanish). 6 June 2016. Retrieved 7 June 2016.
^Callero, Borja Luis (22 August 2016). "Estreno de oro del Leganés en Primera" [Golden debut of Leganés in Primera]. Marca (in Spanish). Retrieved 22 August 2016.
^"セランテス選手 UDログロニェスからの完全移籍での入団について" [First Team Serantes joins team on a permanent transfer from UD Logroñés] (in Japanese). FC Imabari. 8 December 2022. Retrieved 15 December 2022.