The Spaniard is getting used to life at Stamford Bridge after having signed for the Blues from Atletico Madrid on a season-long loan deal last month.
Chelsea FC moved to bring in the 26-year-old midfielder on a temporary deal and they also have the option to make his move permanent at the end of the season.
Saul started Chelsea FC’s clash with Aston Villa at Stamford Bridge on Saturday night but he struggled to find his feet in the game as the Blues claimed a comfortable win thanks to two goals from Romelu Lukaku and Mateo Kovacic’s strike.
Tuchel has now accepted responsibility for Saul’s difficult start and admits he probably threw him into the fray too early.
Asked about Saul’s performance at his post-match news conference, Tuchel said: “He struggled.
“I take the responsibility for that. I put him into a difficult match after a national break.