Ex-Chelsea goalkeeper Mark Schwarzer says Kepa Arrizabalaga could be at the club for the next 15 years.
The Spaniard has played well this season despite only collecting one clean sheet.
He has also usurped David De Gea in the Spain national team, and Schwarzer is expecting plenty more from the 25-year-old.
"I think Kepa has grown, but it's a massive step up from Athletic Bilbao," the Australian told The Athletic. "There is always that added attention. Chelsea over the years have had top, top keepers. Following [Petr] Cech and [Thibaut] Courtois is no easy feat for anyone.
"It's hard for anyone to compare with someone like Cech, who won every [club] trophy there is to win. We can only really do that with Kepa 10 years down the line. With Thibaut, he was there for a shorter amount of time. I was a big fan of his, but longevity is huge so Petr stands alone.
"At 25, Kepa is very young in goalkeeping terms. He has a long way to go. He could be there for the next 15 years easily - if he stays fit and continues to get better and better."
