The 28-year-old winger is currently under contract with Celta until the summer of 2019, but reports in Faro De Vigo claim that talks over extending that deal have hit a stumbling block.
Those suggestions appear to have put Sevilla on red alert, particularly as the Andalusians are managed by former Celta boss Eduardo Berizzo, who originally brought Wass to La Liga from French club Evian in the summer of 2015.
Wass has gone to make over 100 appearances since his arrival at the Balaidos, including seven outings in La Liga this season, while he has also scored in his last two matches against Eibar and Girona.
The former Benfica player, who is regarded as a bit of a set-piece specialist, is believed to be interested in a move to Sevilla and Celta could well choose to cash in on one of their prize assets during the summer, to avoid losing him on a free the following year.
Ronaldo and co must back up fine display against Spain
Marc Albrighton says he is looking forward to 'pulling on a Leicester City shirt' again as the new season draws closer.
Liverpool have offered Newcastle United the chance to sign Liverpool striker Daniel Sturridge for £15million, reports claim.