The Spanish midfielder moved from Los Leones (The Lions) in 2014 and went on to make 189 appearances for United.
During his six-year stay with the Reds, he won the FA Cup, EFL Cup, Community Shield and Europa League.
Herrera departed in 2019 when he joined then French champions Paris Saint-Germain, signing a five-year-deal. He has since added French domestic honours, including Ligue 1 and the Coupe de France to his accolades.
First breaking on to the scene with Real Zaragoza back in 2008, at just 19 years old, the midfielder was a mainstay the following season, helping his boyhood club retain their top-flight status while also netting his first goal in a 4-1 defeat to RCD Mallorca.