Arsene Wenger and his Arsenal team became the first and only team to finish a Premier League season without a single loss. The Gunners finished the 2003/04 season invincible, with 26 wins, 12 draws and zero losses and 11 points clear of second-place Chelsea - in fact in their entire unbeaten run (49 matches), The Gunners picked up 121 points.
This impressive feat has never been repeated, though Liverpool did come close in the 2018/19 season only losing one game.
However, since the invincible 2003/04 season, The Gunners haven’t won another Premier League title, with their title drought extended to 18 years going into the 2022/23 season.