5 things you need to know before tonight's WWE Monday Night RAW (May 20th, 2019)

#2 Mysterio retaliates after Grand Slam win

Mysterio captured the US Title and the Grand Slam but suffered the wrath of Joe post the match.

Rey Mysterio may have captured the United States Championship and completed the WWE's Grand Slam in the process, but Money in the Bank did not quite go how the new champion would have planned.

Moments after toppling Samoa Joe to win the star-spangled strap, the now-former champion assaulted Mysterio, in front of his son Dominick no less. Mysterio has always been lauded as a Superstar with great honour, so the masked marvel must be raging after the post-match assault.

Expect the man of mystery to have plenty to say tonight, on his very first RAW as the new United States Champion. Of course, Mysterio should keep a watchful eye out for another sneak attack by the Samoan Submission Machine, both for himself as well as for his son.