Alcaraz scheduled to face Michelsen in Tokyo opener
ATP lists the Thursday match not before 4 p.m. Japan time, subject to order-of-play changes.
Carlos Alcaraz is scheduled to face Alex Michelsen in his opening match at the Japan Open in Tokyo on Thursday, October 1. The ATP Tour's September 30 schedule report places it on Colosseum, not before 4 p.m. Japan Standard Time.
Not before is an earliest scheduled start, not a promise that the first serve will be at that exact minute. Earlier matches, weather or an amended order of play can affect the actual start.
The ATP identifies Alcaraz as the top seed and defending Tokyo champion. Those are tournament-context facts, not a prediction that he will win the opening match or retain the title.
ScoreZaap has written this original schedule summary from the linked tour report. It states the published venue-local time rather than silently converting it into a reader's timezone. Check the official order of play for changes and use the tennis live view when the match is underway.