On 30 August 2019, Sánchez renewed his contract with Atleti until 2023.[4] He made his first team – and La Liga – debut on 14 December, starting in a 2–0 home defeat of CA Osasuna.[5]
On 7 September 2020, Sánchez further extended his contract until 2025.[6] The following 11 January, he moved to fellow top tier side Osasuna on loan for the remainder of the season.[7]
On 17 August 2021, Sánchez returned to Osasuna on loan for the 2021–22 campaign.[8] On 27 July 2022, the loan was extended for an additional year.[9]
On 3 July 2023, Sánchez signed a five-year contract with RC Celta de Vigo also in the top tier.[10] On 23 July of the following year, he was loaned to fellow league team Deportivo Alavés for the season.[11]
^"Manu Sánchez debutó ante Osasuna" [Manu Sánchez debuted against Osasuna] (in Spanish). Atlético Madrid. 14 December 2019. Retrieved 21 December 2019.