On July 12, 2018, Eskişehir announced their withdrawal from the competition, leaving an open spot in group C[2] that would be occupied by Lietkabelis.

[3] League positions after eventual playoffs of the previous season shown in parentheses (TH: Champions League title holders; FEC: FIBA Europe Cup title holders).

[5] The losers of all the rounds entered the 2018–19 FIBA Europe Cup regular season.

After the retirement of Eskişehir, the winner of the series between Red October Cantù and Telenet Giants Antwerp joined directly the regular season.

Winners of game 13 will directly qualify to the regular season without playing this round.

On 5 April, the Sportpaleis in Antwerp, Belgium was announced as the venue of the 2019 Final Four.

[8] After each gameday a selection of five players with the highest efficiency ratings is made by the Basketball Champions League.

Afterwards, the official website decides which player is crowned Game Day MVP.

Based on final position, teams received prize money from the BCL.