Arsenal succumbed to a shock 2-0 defeat against Bournemouth that saw William Saliba sent off.
The gunners They traveled to the south coast having gone unbeaten in their first seven matches, but fell short on Saturday.
At around the 30th minute, Saliba fouled Bournemouth striker Evanilson as he ran into the Arsenal half.
Saliba Referee Robert Jones initially showed him a yellow card, but after a VAR review, the centre-back was sent off.
Arsenal manager Mikel Arteta opted to make a change amid their new one-man disadvantage but it failed to make a positive impact.
MORE ABOUT THE PREMIER LEAGUE
Bournemouth He scored the first goal in the 70th minute when Ryan Christie fired in after a clever corner routine.
The Cherries were in dreamland soon after when David Raya fouled Evanilson in the box and Jones pointed to the spot.
Justin Kluivert was the man who stepped up from 12 yards out and did so with ease to score his team's second and seal the three points.
Arsenal missed the chance to top the Premier League and could finish the weekend in fourth place if Chelsea beat Liverpool.
The north London side were without two key stars in Bukayo Saka and captain Martin Odegaard due to injury.
Saka was injured for England against Greece during the international break, while Odegaard has been absent since August.
It is clear that they lacked quality against Bournemouth in what was a performance well below their standards.
Premier League title rivals Manchester City could open a three-point gap with a win at Wolves on Sunday.
However, Liverpool could improve and be four points behind Arsenal if they win at home against Chelsea.
The Reds will next face the Gunners at the Emirates Stadium in what will be a crucial clash at the top of the table.
Arsenal will be without Saliba for the match following his red card, the club's third of the season.
Their result at Bournemouth could be a blow to their title hopes, but there is still a long way to go until a winner is crowned.