The Spanish centre-forward has not featured in Antonio Conte's squad lists since mid-January and this week, the Blues manager announced that the player is carrying a back injury.
But he has struggled since, scoring just two in his last 10 league games and attracting criticism for several wasteful performances in front of goal.
In the uploaded/filmed video, there was no sign of a "severe" back injury shown by the Chelsea Star as opposed to someone who really is going through such a big injury as claimed by the Football star.
Speaking ahead of the encounter, Morata told Movistar+, "Messi can't be stopped". "It is a team where I am very happy, where I started well until I had some physical problems". "I don't know [when he'll be back] because he has this problem and we tried a lot to find a solution to solve the pain in his back".
"Can Madrid win the Champions League?".
That appears to not be the case, at least according to Morata himself, although it remains to be seen whether fans can expect him to play any part in the home clash against the Baggies.
"But first, we have to play a good game here and get a good result, which is not easy against Barcelona".
Morata has made a solid enough start to life at Stamford Bridge following his move from Real Madrid in the summer transfer window.
'But I didn't play knockout games in the Champions League, neither against Barcelona, Atletico Madrd, Sevilla or Valencia.