Tottenham Hotspur are set to receive £5 million if Gylfi Sigurdsson completes a £50 million transfer from Swansea City to Everton.

Sigurdsson joined Swansea for a nominal fee as part of the deal in which Ben Davies and Michel Vorm signed for Spurs three years ago, but his former club negotiated a 10 per cent sell-on clause for the Iceland midfielder.

Tottenham considered re-signing Sigurdsson at the end of last season, but were deterred by Swansea’s £50 million valuation, which is also holding up his proposed move to Goodison Park. Everton made a second bid of £40 million plus £5 million in add-ons this week, which was rejected by Swansea.