Liverpool loanee Giorgi Mamardashvili admitted his drop in form after making another costly mistake during Valencia's clash against Real Valladolid on Saturday.
The Georgian goalkeeper is set to arrive at Anfield at the start of the next term, although his role as an undisputed starter remains unknown.
Mamardashvili will join the Reds amid Alisson's stunning form throughout this season, which peaked in the challenging win over Paris Saint-Germain on Wednesday when the Brazilian made nine saves.
Caoimhin Kelleher remains a convincing back-up option in Arne Slot's toolkit, even though his future remains in limbo.