September 16, 2017, Getafe 1-2 Barcelona: Denis Suarez and Paulinho entered the pitch in the second half to score one goal each and help Barca to produce a stunning comeback.
October 14, 2017, Atletico 1-1 Barcelona: The Catalans were trailing since the 21st minute with Valverde replacing Nelson Semedo with Sergi Roberto on the hour mark who eventually assisted on Luis Suarez's equalizer.
February 23, 2019, Sevilla 2-4 Barcelona: The Catalans were losing 2-1 in the first half but completely turned the game around thanks to Ousmane Dembele and Sergi Roberto's appearance straight after the break.
August 31, 2019, Osasuna 2-2 Barcelona: Both Barcelona goals arrived from the substitutions as goalscorers Ansu Fati and Arthur Melo entered the pitch in the 46th and 53rd minutes respectively.
October 2, 2019, Barcelona 2-1 Inter: Arturo Vidal replaced Sergio Busquets shortly after the break and was heavily involved in both Luis Suarez's goals as he even assisted on the equalizer.
By the way, Valverde's predecessor, Luis Enrique, wasn't much renowned for his game-changing substitutions. Instead, he was often accused of reacting too late.
