Arsenal was surprised by Southampton in the fourth round of the FA Cup on Saturday.
The defending champion lost 1-0 in St. Mary's Stadium.
The Brazilian defender Gabriel passed his own goalkeeper in the 24th minute and thus unfortunately scored the only goal of the match.
The Gunners were unable to shake the home side and suffered a costly defeat.
With the loss, Arsenal continues a very disappointing season.
The team of manager Mikel Arteta occupies the tenth place in the Premier League and is thirteen points behind leader Manchester United after nineteen matches.
At the end of last year, Arsenal was also eliminated from the League Cup.
The London club managed to hibernate in the Europa League and will take on Benfica next month.
Last season, Arsenal was the strongest in the illustrious English cup tournament.
In the final, Chelsea was beaten 2-1.