1. THE REVIVAL OF ROSS BARKLEY
The attacking midfielder joined in January but has been plagued by injury problems which hindered the start of his Stamford Bridge career.
Former Blues boss Antonio Conte often deployed the Englishman as one of his front three to little effect.
But he played in a deeper role – with Jorginho and Cesc Fabregas – during this pre-season and his pace and power were effective in driving towards the opposition box.
Barkley, however, is likely to be back-up to N’Golo Kante, who led France to the World Cup in Russia.
2. WHAT IS SARRIBALL?
It is a fast-paced, possession-based style of attacking football named after Maurico Sarri, when the Chelsea manager was at the helm of Napoli.
Much like Pep Guardiola’s tikitaka, but Sarriball is a little more vertical in its advancement.
It also features short and swift passing but with an emphasis to move up the pitch in the shortest time possible, usually with just one touch of the ball from each player.
3. CHELSEA’S NO. 1 PROBLEM
The uncertainty surrounding the Blues’ No. 1 goalkeeper Thibaut Courtois, who has been linked to Real Madrid, is perhaps a pressing issue for Sarri to address, especially with back-up Willy Caballero failing to impress in the pre-season International Champions Cup match against Inter Milan.
Robert Green, 38, is one of onl two signings Chelsea have made, but the former England international is hardly a replacement for Courtois.