Following the success at the 2018 FIFA World Cup, Belgium was expected to perform well in the inaugural UEFA Nations League competition but collapsed in their final match against Switzerland, losing 5–2 despite a 0–2 lead, to miss out on the Nations League Finals.

The UEFA Euro 2020 qualifying Group I campaign was however started with four straight wins.

The following teams had achieved promotion or suffered relegation going into the 2018–19 season.

Champions Club Brugge qualified directly for the group stage of the Champions League, while runners-up Standard Liège started in the qualifying rounds.

As Standard Liège also had won the Belgian Cup, third placed Anderlecht qualified directly for the group stage of the Europa League, while Gent and Genk started in the qualifying rounds.