The wing-back has questioned where he stands in their plans.
"I was penalised at Juventus by a few injuries," Isla said. "I don't know if I will stay as my agent is looking after that side of things.
"I can only say that I have received a number of offers from clubs in Italy and from sides in Spain as well.
"The decision, however, is down to Juve and Udinese seeing as they own my contract."