Tchikou, ranked No. 56 in the 2020 ESPN 100, made the announcement in a statement posted to Twitter.
The 6-foot-11, 210-pound center announced last week that he was reclassifying to the Class of 2020.
The four-star prospect, who is originally from France, has been playing for Dream City Christian School in Glendale, Arizona. The 18-year-old is skipping his senior season to enter college this year.