By Ryan Taylor Dele Alli may have already played his last game for Everton \- much to the frustration of his former club Tottenham. Spurs are due a payment of £10million once he clocks up 20 appearances for the Toffees. He is currently on 13 but now looks incredibly unlikely to reach the landmark, which Tottenham unsuccessfully attempted to re-negotiate in early December. The north London club proposed the idea of reducing the payment to £8m in exchange for lowering the number of appearances that were required. However, it now looks as though Everton will swerve the deal altogether as they see…