Can Michael McGovern do the double but stay a Firm favourite by switching to Rangers?
Could Michael McGovern become the first Northern Ireland player to bridge the great Glasgow football divide?
The international goalkeeper, a former Celtic player, has been linked with a switch to Rangers.
Reports in Scotland say the 31-year-old could move on a free transfer this summer.
He would join a select few players - and become the first from Northern Ireland - to sign for both of Glasgow's Old Firm.
McGovern has seven caps for Northern Ireland and will aim to make the team for this summer's Euro 2016 finals in France. He currently plays for Scottish Premiership side Hamilton Academical.
Originally from Fermanagh, he joined Celtic as a 17-year-old in 2001, having emerged as a young prospect at Enniskillen Town United. But he left in 2008 without a first team appearance.
McGovern has since had spells with Dundee United, Ross County and Falkirk. He is out of contract this summer, and the Scottish Sun reported that Aberdeen and Rangers are both keen to land him.
If it happens, the significance would be felt far beyond the football pitch. Only a handful of players have had spells at both Celtic and Rangers.
The most controversial was Mo Johnston, the Glasgow Catholic who turned his back on Celtic to sign for Rangers in 1989.
The first post-War player to sign for both Old Firm clubs was Alfie Conn. Starting at Rangers, Conn was part of the team that won the European Cup Winners' Cup in 1972. He spent three years at Tottenham before moving to Parkhead.
In recent years it has become less of an issue for footballers to cross the divide.
Steven Pressley, a product of the Rangers youth system, was signed by Celtic in 2006. He was in the Celtic side that won the Scottish Cup.
Another Rangers youth product who eventually ended up at Celtic was goalkeeper Mark Brown.
Of the five who have signed for both clubs in the modern age, Kenny Miller is the only one to have crossed the divide twice.