Sunderland goalkeeper Max Stryjek has suffered a slight injury setback.
The 21-year-old joined League Two Accrington Stanley on a season long loan this summer but suffered a hamstring injury on his Stanley debut.
Stryjek was replaced in only the ninth minute of their hard-fought 2-1 derby win away at Morecambe on September 2 and had to return to Sunderland's Academy of Light to be assessed and for treatment.
Stanley manager John Coleman has revealed Stryjek, who was expected back at Stanley this week, has suffered a slight setback and now won't be returning for at least another week.
Coleman said: "Unfortunately Max has had a bit of a setback.
"He’s going to be staying up at Sunderland for the next week or so which is a blow."
Stryjek, a regular for Sunderland's Under-23 side, had been looking forward to the opportunity of a loan move to get some regular first team football under his belt.
On joining Stanley, Stryjek said: "I’m expecting a huge challenge, it’s going to be faster and more physical and I’ve got to make sure that I’m ready for that."