Gray is yet to start in the Premier League for Leicester this season.
Sport says that 21-year-old still has to agree personal terms to complete the move.
Reds holding out for £30m to part with Sakho.
Palace were considering re-appointing their former manager should De Boer fail to turn things around.
France international enjoyed a massively productive loan spell at Selhurst Park towards the end of last season.
Ex-Crystal Palace boss queries if Jurgen Klopp will give centre-back an opportunity to resurrect his Reds career.
With the arrival of Davinson Sanchez and proposed capture of Juan Foyth, Wimmer is not needed by Spurs.
Sakho has been linked with a return to Crystal Palace but the Eagles are not willing to pay £30m for Frenchman.
Dutch Under-21 international signed for Crystal Palace on a season-long deal earlier this month.
Sakho performed admirably for Palace during the second half of last season.
Palace have won on their last three visits to Anfield.
Coutinho has been heavily linked with a move to Barcelona.
Eagles boss refused to rule out a move for RB Leipzig winger Olivier Burke.
Woodman is keen to go on loan to a League One outfit this season in order to further his development.
Loftus-Cheek joined Palace on a season-long loan earlier this summer.
Sanchez is also wanted at Barcelona, Chelsea and Crystal Palace this summer.
The 19-year-old will spent the 2017-18 season in south east London with Frank de Boer.
The Dutchman's appointment and Wilfried Zaha's retention can lead to a season of calm.
Fosu-Mensah underwent his Palace medical ahead of his loan move to Selhurst Park.
Fosu-Mensah, 19, worked with Palace boss Frank de Boer at Ajax.
Midfielder joined Crystal Palace earlier this month for his first loan stint away from Stamford Bridge.
Back-up goalkeeper insists he has not spoken to compatriot Frank de Boer regarding Selhurst Park move.