Birmingham City manager Harry Redknapp ran the rule over Aberdeen winger Jonny Hayes at Hampden Park on Saturday.
Republic of Ireland international Hayes, 29, is also a target for Saturday's Scottish Cup final opponents Celtic and Cardiff City.
Aberdeen's manager Derek McInnes will also consider taking Hayes to Sunderland should he succeed David Moyes over the coming weeks.
McInnes has emerged as a frontrunner for Sunderland owner Ellis Short in recent days.