Chelsea have signed 4 players thus far - Caballero, Rudiger, Morata and Bakayoko.
Perez made only 2 league starts for Arsenal last season.
Coutinho has been heavily linked with a move to Barcelona.
The trio were heavily involved during Arsenal's pre-season tour of Australia and China.
Barry completed a move to West Brom after four years at Everton.
Sanchez missed the opening Premier League game of the season due to an abdominal strain.
Sakho is no longer included in Liverpool manager Jurgen Klopp's plans at Anfield.
Coutinho and Borussia Dortmund's Ousmane Dembele are wanted by Barcelona.
Matic, 29, joined United in a £40m transfer last month.
Ex-England skipper notches his fourth career double century before England declare on 514-8.
Spurs could go six points clear of Chelsea if they win the first ever Premier League match to be played at Wembley.
Red Devils boss happy with current squad and prepared to wait until January to make further additions.
Spurs boss admits he wants to bring in a quartet of players before the transfer window shuts on 31 August.
Sigurdsson, 27, became Everton's record signing when he arrived at Goodison Park for £45m earlier this week.
Chelsea have just one recognised central midfielder available ahead of their clash with Tottenham.