Ross Barkley, Pedro, Cesc Fabregas, Tiemoue Bakayoko Marcos Alonso and David Luiz were among the big names to have returned. However, the players are unaware of the situation and are faced with waiting until Monday to see who will be running their session.
The London club have yet to sack Antonio Conte as manager despite having wanted to replace the Italian with his compatriot Maurizio Sarri, formerly Napoli boss, for several months. However, a contractual dispute with Napoli has reportedly prevented Chelsea from snapping Sarri up, leaving Conte at the helm after he regularly challenged the hierarchy's authority with comments about their transfer policy in the most recent campaign.
Conte, 48, also has a clause in his contract that guarantees him a pay-off, thought to be £9m, for the final year of his deal.
The long-running saga surrounding Conte has rumbled into Chelsea's pre-season, causing new signings to be delayed as the coach and staff push for their optimum compensation from owner Roman Abramovich, which is for a year's salary and an optional year.
Chelsea's transfer business has been stalled, with the transfer window for Premier League clubs now being set at August 9, giving them four more weeks to bolster their squad.
It appears the Blues have been successful as talkSPORT are citing a report from Premier Sport that claims Chelsea have now agreed a £35m fee with Juventus following lengthy negotiations between the two clubs.