Odd situation at Raducanu match; hiding behind umpire chair and man taken by police?

Deeply odd and disturbing moment at the Raducanu-Muchova match where Emma seemed to be scared and panicking about something, then hid behind the umpire chair while police came and took a man near the match away. Not sure if it’s anything to do with her ongoing stalker situation, but this is deeply scary and unfortunate if so.