Barcelona suffered a heavy 3-0 defeat to Juventus in the Champions League quarter-final on Tuesday night.
Meanwhile, rivals Real Madrid recorded a 2-1 win over Bayern Munich to put one foot in the semi-finals.
And Lionel Messi is well aware Barcelona need to strengthen in the summer while also shipping out the deadwood if they want to compete with their arch rivals.
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According to Spanish publication Diario Gol, Messi wants Andre Gomes, Jeremy Mathieu, Aleix Vidal and Paco Alcacer gone.
Gomes and Alcacer are only in their first campaign with Barcelona but both players have failed to maintain a regular starting spot under Luis Enrique.
The report suggests Arda Turan, Lucas Digne and Denis Suarez are all walking on the tightrope with their performances yet to live up to expectations at the Nou Camp.
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Messi’s frustrations stem from the aforementioned names not being at the level of Real’s players.
The report suggests the likes of Real’s players including Marco Asensio, Isco, Lucas Vasquez, Mateo Kovacic, James Rodriguez and Alvaro Morata – who are more often than not squad players – contributing more than Barcelona’s.
Barcelona will go head-to-head with Real in El Clasico on April 23.