group stage

US /ˈɡruːp steɪdʒ/
UK /ˈɡruːp steɪdʒ/
"group stage" picture
1.

a phase in a tournament where teams or competitors are divided into groups and play against each other, with the top performers advancing to the next round

:
Our team successfully advanced from the group stage to the quarterfinals.
The draw for the group stage will be held next month.