Alan Hutton claims that the form of Alfredo Morelos and Odsonne Edouard on the European stage will see teams launch transfer moves for the Rangers and Celtic stars.
The former Gers full-back, speaking exclusively to Football Insider correspondent Dylan Childs, cited his switch to Spurs in 2008 as evidence that performances in Europe can attract top clubs.
Edouard scored a sublime goal as Celtic came away from Copenhagen with a 1-1 draw going into next week’s second leg.
It was the 22-year-old’s fourth goal in Europe this season and his 24th in all competitions.
When asked if good performances in Europe would make it more difficult for the Old Firm to keep their prized assets, Hutton told Football Insider: “No matter what team you are at, if you are scoring goals as a striker there are going to be teams sniffing about.
“But playing in the big tournaments, Europe or the international scene, and also doing what you are doing at domestic level – teams will come looking.
“I will always remember when I went to Tottenham. The sporting director told me that he only watched me in European games and international games. That is just how he looks at it.
“I think the Scottish league has come on leaps and bounds but that is what he told me. Rangers and Celtic should always be in the European competitions and playing on that stage there will always be people sniffing about.”
Morelos impressed in Rangers’ comeback win against Sporting Braga on Thursday night but failed to find the net.
The 23-year-old will miss next Thursday’s second leg after receiving his fifth yellow card of the competition – the Colombian will serve a one-match ban.