The Liverpool wing-back endured a difficult campaign plagued by recurring hamstring issues, limiting both his consistency and availability throughout the season.
Koeman confirmed that while Frimpong remains a highly talented player, the coaching staff opted for profiles they believe better suit the team’s structure and balance heading into the tournament.
"It’s true that he’s been injured quite often this season; against Ecuador, he came on as a substitute but had to come off again very quickly," Koeman said about Frimpong.
"That’s a physical issue, but I’ve also chosen someone else to play on the right wing: Summerville. That comes as no surprise to me, as I wanted to call him up back in March.
“ I like that sort of player who is reliable on the pitch. He’s very capable of playing on the right flank, too, but his work ethic is exceptional."