Alli signed a new five - year contract only in January .
It is a measure of how highly manager Mauricio Pochettino regards the midfielder that Spurs have further extended Alli 's deal and significantly Alli 's his wages .
Alli signed a new five - year contract only in January , but it is a measure of how highly manager Mauricio Pochettino regards the midfielder that Spurs have further extended his deal and significantly increased his wages .