Spurs' search of their first league win at Wembley continues.
The 20-year-old endured a disappointing debut against Newcastle United.
Bayern allowed Sanches to join Paul Clement's Swansea City on loan.
A 1-0 win for Sean Dyche's side leaves Palace still pointless and goalless this season.
Mbemba was forced after an hour due to the knock.
Mawson has hailed Paul Clement and Swansea board for signing Renato Sanches on loan.
Sigurdsson performed admirably for the Swans and proved crucial to keeping them up last season.
Spaniard has agreed on a two-year deal, with the option of a further season.
Paris Saint-Germain right-back was granted a UK work permit by the Home Office on Thursday.
Sanches struggled in his debut season at Bayern, a year after winning the Euro 2016 with Portugal.
Sanches, 20, has struggled to establish himself at the Allianz Arena.
Toffees signed Llorente's former partner in crime Gylfi Sigurdsson a couple of weeks ago.
Llorente has played under Conte when the two were at Juventus.
The Baggies are reluctant to let Chadli go without having a replacement lined-up.
Ernesto Valverde also confirmed last week that the Spanish midfielder doesn't feature in his plans.
Thew Swans have lost just one game at home since January.
Sigurdsson, 27, became Everton's record signing when he arrived at Goodison Park for £45m earlier this week.
Jose Mourinho confirms that duo will play for Ricky Sbragia's Under-23s at Leigh Sports Village.
Toffees finally completed £45m deal for Sigurdsson ealrier this week.
The Swans boss says two or three signings could now arrive after Gylfi Sigurdsson's exit.
Sigurdsson, 27, has put pen to paper on a five-year deal.
Sigurdsson may feature against Manchester City on Monday despite not having much of a pre-season.