#1 Antoine Griezmann
It seems a bit harsh classifying Griezmann as a disappointment, as the French international was Barcelona's brightest spark in the first half.
The 28-year-old was making his first appearance in a Barcelona shirt after completing his highly protracted transfer earlier in the summer and would understandably have had all eyes on him.
Griezmann starred in the first half, fashioning a number of chances for his teammates and had a shot at goal, but he would not want to see replays of an incident in the 25th minute when he lashed out at thin air after being presented with a decent goalscoring opportunity.
While his first-half display was impressive, the World Cup winner faded after the break and failed to make any meaningful contribution through the course of his time on the pitch.
Griezmann was the highest-profile Barcelona player on display against Chelsea and seeing as this was his first match in a Barcelona shirt (albeit unofficially), a bit more would have been expected from him.