Logan Paul is adding EVEN MORE fuel to his rivalry with KSI ahead of their monster August fight ... saying straight up the YouTube star is "my bitch!!"
Paul was out shopping on Rodeo Drive and was asked if he was ready to take on KSI in their upcoming super fight in England.
And, as has been the case at a nightclub ... on the streets of West Hollywood ... and at their news conference ... Paul took another shot at the social media superstar.