A major hamstring injury, suffered Wednesday in the win over Fulham, will keep the Brazilian international out for the rest of the campaign.

The Brazilian defender, arguably his side’s best player through the 2024-25 season, limped out in the first half of Tuesday night’s 2-1 victory over Fulham. His injury is severe enough that he will become the third Arsenal player this season to require hamstring surgery. Bukayo Saka returned from his own muscle issue later that evening, while Kai Havertz has been out since February after a procedure that will sideline him for the rest of the season.

“Gabi will undergo a surgical repair procedure to his hamstring in the coming days and immediately begin his recovery and rehabilitation program, aiming to be ready for the start of next season,” said Arsenal. “Everyone at the club will fully support Gabi to ensure he returns to full fitness as soon as possible.”

Arsenal’s preparations for their upcoming Champions League quarterfinal against Real Madrid have suffered a significant blow due to Gabriel’s injury.

In addition to Gabriel, Riccardo Calafiori is expected to miss both legs of the upcoming fixtures after suffering a knee injury during the international break. Meanwhile, Ben White, limited to just 16 appearances this summer following keyhole surgery in November, also missed the match against Fulham due to knee discomfort.

Without these key defenders, Arsenal may need to utilize Thomas Partey at right back and Jakub Kiwior alongside William Saliba in central defense as they strive to contain Kylian Mbappe, Vinicius Junior, and Real Madrid’s other superstars.