Laurent Koscielny is a vital member of the Arsenal side.
Both players made late appearances during the pre-season friendly with Wigan on Saturday, with Pereira finding the net in a 2-0 win.
The Blues hierarchy are reportedly struggling to replace Tim Howard.
Aston Villa's Jordan Veretout is reportedly wanted by Marseille.
Welcome to this morning's transfer round-up. This edition features 'Laurent Koscielny linked to Bayern Munich again' and 'Valencia's Shkodran Mustafi interesting Chelsea?' plus more, so delve in below.
Garry Monk has insisted that the defender will not be leaving the Championship side this summer, but is it worth lining up a potential replacement?
Internet forums have been abuzz with speculation of a mysterious secret signing being worked on by West Ham United, but is the cat out of the bag?
Gerard Deulofeu featured in Everton’s win against FK Jablonec in a pre-season friendly game on Saturday.
Rafa Benitez is reportedly willing to sell the goalkeeper this summer.
Chelsea have signed N’Golo Kante from Leicester City.
One in five workers are at risk of working themselves to death.
Ray Parlour has a soft spot for Leeds United supporters.
Newcastle United were knocked out of the EFL Cup by Hull City yesterday evening.
Mauricio Pochettino reportedly wanted to sign Sadio Mane over the summer - but his £130,000-a-week wages at Liverpool are well outside of Daniel Levy's wage structure.
The departure of one of the Premier League's longest serving players could spark a transfer merry-go-round in January.
Manchester United manager Jose Mourinho will reportedly resist any Tottenham approach for Morgan Schneiderlin.
The Liverpool boss says he knew how big a club Leeds are thanks to their former midfielder.
The Leeds United defender is back and ready to fight for a regular starting spot at Elland Road.
Tottenham lost promising youngster Nya Kirby to Crystal Palace.
America's top talents once flocked to Ibrox, although Rangers' fierce rivals Celtic could be their club of choice in future.