The one thing that's readily apparent is that Rapid Wien have been back at this for over a month, while Chelsea are still in the first week of preseason training, and only on the second or third day with Antonio Conte at that. Fitness, cohesion, understanding between the players is lacking, and will be lacking for a while probably.
Chelsea seemed to be lined up in a 4-4-1-1 formation, with a four-man backline of Baba-Papy-JT-Ivanovic, shielded by a midfield pair of Mikel and Matic. Moses and Willian were tasked with running up and down the flanks (not much support from the fullbacks), while in theory, Loftus-Cheek was supposed to help out Diego Costa in attack and help with pressing from the front in defense.
Other than a quickly tiring Matic, a frustrated and isolated Costa, and a willing Moses, most players have not exactly put in impressive shifts. Even the veteran Begovic has had a couple oopsies.
Rapid started very well, obviously buoyed by the raucous home crowd in the first game at the new stadium. Their opening goal was a slick passing move, playing around Djilobodji with ease and then rounding Begovic for a composed finished by 19-year-old Joelinton.
There should be plenty of changes at the half. Plenty of room for improvement.