However, he denied the suggestion that Mourinho, who questioned last.
"I wear it every day," Guardiola said. "Sometimes I forget it, sometimes it's in my pocket or in the bag but it's always there."
Guardiola, meanwhile, winger Raheem Sterling, who was accused of cheating in some quarters after being wrongly awarded a penalty against Shakhtar.
The City manager argued that sterling fell over by accident and was not trying to deceive anyone, having admitted afterwards that it should not have been a penalty.