Defending champions Arsenal crashed out of the 2020-21 FA Cup after going down 1-0 to Southampton at the St. Mary's Stadium in the fourth round of the competition.Centre-back Gabriel inadvertently turned Kyle Walker-Peters's effort into his own net after 24 minutes, and Arsenal never recovered from that setback.The visitors offered little to nothing in attack and merely toiled in their own half for most of the match, trying to repel wave after wave of Southampton attacks.The loss ended Arsenal's pursuit of a 15th FA Cup crown, as the Saints advance to face Wolverhampton Wanderers next. On that note, here are the Arsenal player ratings:Bernd Leno - 6/10Bernd Leno was seriously unlucky with the own goal but had little else to do all game.Hector Bellerin - 6/10Hector Bellerin struggled to cope with Southampton's pressing in the first half but improved after the break, driving forward to help out in Arsenal's attack.Rob Holding - 5/10It was a disappointing game for the otherwise reliable centre-back; Rob Holding couldn't keep the likes of Ings and Adams quiet.Gabriel - 5/10Gabriel was all over the place at the back, lacking coherence and composure throughout the game.508 - Gabriel’s own goal was the first goal Arsenal have conceded since Tammy Abraham’s strike for Chelsea on Boxing Day, ending the Gunners’ run of 508 minutes (5 games) without conceding in all competitions. Breached. #SOUARS— OptaJoe (@OptaJoe) January 23, 2021Cedric Soares - 5/10Back at his old stomping ground , the Portuguese full-back Cedric Soares overhit his crosses, while leaving plenty of gaps at the back for Walker-Peters and Armstrong to run into.Mohamed Elneny - 4/10It was an absolute horror show from Mohamed Elneny. The Egyptian was guilty of conceding possession cheaply, one of which resulted in the only goal of the game.Granit Xhaka - 6/10Southampton's pressing kept Granit Xhaka from dictating the play like he usually does; the Swiss spent most of the time in the Arsenal half trying to defend.Nicolas Pepe - 6/10While the first half was hopelessly poor for Nicolas Pepe, he managed to improve considerably after the break, creating a bevy of chances for Arsenal in the closing stage of the game.Chances created by Arsenal vs. Southampton:◎ Nicolas Pépé (5)◎ Cedric Soares (1)◎ Eddie Nketiah (1)◎ Willian (1) pic.twitter.com/ORw7dAY0ik— Squawka Football (@Squawka) January 23, 2021Willian - 5/10Arsenal must be really left wondering if there's any point having Willian in the squad. The Brazilian was atrocious by all accounts, offering nothing creatively while also squandering possession cheaply.Willian has produced just two shots on target in his 20 appearances in all competitions for Arsenal this season. pic.twitter.com/xHJcA1qQaf— Squawka Football (@Squawka) January 23, 2021Gabriel Martinelli - 6/10Gabriel Martinelli was arguably the best forward for Arsenal, as his off-the-ball movements discomfited Southampton on the night.Edward Nketiah - 5/10After an anonymous first-half, Edward Nketiah improved after the break, making some darting runs through the middle and getting into good positions.Ratings of Arsenal SubstitutesThomas Partey - 7/10Thomas Partey was like a breath of fresh air in the Arsenal midfield after replacing the ineffective Elneny.Bukayo Saka - 6/10Bukayo Saka brought much more guile and urgency to the Arsenal attack than what Willian and Pepe managed to conjure despite playing the entire game.Alexandre Lacazette - 5/10Alexandre Lacazette provided a focal point to Arsenal's attack but the Frenchman couldn't find a match-salvaging goal.