Tottenham and Bayern Munich are in the final stages of completing a £30m deal for Mathys Tel.
Tel was originally signed on loan with a view of a permanent deal in January under former boss Ange Postecoglou, who has since been replaced by Thomas Frank.
Frank has given the deal his approval.
Spurs paid a £7.3m loan fee in January and that temporary deal was always intended to become a permanent one with Postecoglou often quoting the Tel deal was with the long-term in mind.
The forward started 11 games for Spurs in the Premier League, playing a total of 913 minutes, scoring twice.
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Manchester United, Chelsea and Aston Villa were all interested in Tel in January.
Stade Rennais - Tel's former club - have a share of the sell-on in the region of 10 to 15 per cent.