Juan Manuel "Juanma" Lillo Díez (born 3 November 1965) is a Spanish football manager, currently assistant coach at Premier League club Manchester City.

[7] After a year-and-a-half break, Lillo returned to take the reins of Real Zaragoza – the team had qualified for the UEFA Cup the previous season, and manager Txetxu Rojo moved to Athletic Bilbao.

He insinuated that the team he was battling against to avoid relegation, Televisa-owned San Luis, had gained unusual victories against more powerful opposition, which were also owned by the Televisa group; this caused much controversy in both the Mexican press and football league.

[19] On 8 October 2015, Lillo joined Jorge Sampaoli's staff at the Chile national team, being handed the role of handling the transition of players from the youth sides to the main squad.

[20] On 21 June 2017, after leaving Sevilla where he was working under the same manager,[21] he was announced as the new coach Atlético Nacional in place of Reinaldo Rueda;[22] he resigned from his position at the latter in December, after being eliminated by Deportes Tolima in the quarter-finals of the Categoría Primera A.

[23] Lillo switched continents again in September 2018, joining Japanese J1 League club Vissel Kobe who had recently signed high-profile compatriot Andrés Iniesta.