Seferovic netted 26 goals in all competitions, almost matching the 27 strikes he got in the 2018/19 campaign.
The ex-Frankfurt hitman is believed to have a release clause of £50million in his Benfica contract.
But Spurs believe they could land Seferovic for half that.
New manager Nuno, Daniel Levy and new sporting director Fabio Paratici are keen to ensure a top-class striker is ready to take over from Harry Kane should the England captain force his way out this summer.
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