Premier League side Aston Villa will have to work hard to hold onto a backup player.
The Midlands club are facing a fight to keep young keeper Viljami Sinisalo for next season and beyond.
Per The Sun and other sources, Celtic are interested in bringing him to Scotland.
With Joe Hart retiring, the Bhoys are eager to sign a top young keeper for the coming years.
Aside from Sinisalo, they are also assessing Liverpool's Caoimhin Kelleher, who wants a summer move as well.
Kelleher has impressed this season when deputizing for no.1 Alisson Becker at Anfield.