Koeman currently manages the Netherlands national team, and Liverpool stars Georginio Wijnaldum and Virgil van Dijk will meet up with his squad for the Nations League Finals just days after the Champions League final in Madrid.
The Netherlands face England in their semi-final match on 6th June, and Koeman wants Liverpool's dutch duo to be in a positive mood when they join the rest of their teammates in Portugal.
"It would be rather sour if both ended up empty handed after such a formidable season and being so close to huge trophies", Koeman told reporters as the Dutch prepared for the Nations League with a training camp this week.
"Van Dijk, Wijnaldum and Liverpool do not deserve that".
This declaration is likely to aggrieve fans of Liverpool's bitter rivals Everton, whom Koeman managed between 2016 and 2017.