Arsenal demonstrated once again why they are the team to beat in the Premier League this season, grinding out a gutsy 2-1 victory over Chelsea at the Emirates Stadium on Saturday to re-establish their five-point lead at the summit.

It was a contest defined by set-piece supremacy, defensive resilience, and a decisive red card that ultimately tilted the balance in the hosts' favour. For Mikel Arteta, the three points were as precious as they were hard-earned. For Chelsea, it was another painful reminder that fine margins continue to work against them at the business end of the campaign.

Arsenal took the lead in the 21st minute through a route that has become depressingly familiar for their opponents this season: a corner kick. Bukayo Saka, whose delivery from dead-ball situations has been nothing short of elite, whipped a dangerous ball into the box that found the head of William Saliba. The French defender's effort deflected in off Mamadou Sarr, giving the Chelsea goalkeeper no chance and sending the Emirates into raptures. It was a goal that underlined Arsenal's extraordinary aerial threat from set pieces, a weapon that has been the backbone of their title challenge.

Chelsea, to their credit, refused to wilt. The visitors found their way back into the contest through an unlikely source when Arsenal defender Piero Hincapie turned the ball into his own net, levelling the scores and injecting fresh belief into the travelling support. For a spell, Chelsea looked the more likely side to find a winner, pressing with purpose and creating half-chances that kept David Raya on his toes.

The game's pivotal moment arrived in the 70th minute when Pedro Neto was shown a second yellow card for a reckless challenge on Gabriel Martinelli. It was a wild lunge that left the referee with little choice, and it left Chelsea facing the final 20 minutes a man down in a hostile environment.

Arsenal smelled blood. Just minutes after the dismissal, Jurrien Timber rose highest to meet another pinpoint corner delivery and powered a header into the net to restore the Gunners' advantage. It was a goal that carried the air of inevitability about it, Arsenal punishing their rivals from set pieces yet again with clinical precision.

The statistics tell their own story. Arsenal have now scored 16 goals from corners in the Premier League this season, equalling the all-time record for a single campaign. It is a remarkable achievement that speaks to the meticulous preparation on the training ground and the sheer physical presence Arteta has assembled in his squad. Defenders like Saliba and Timber are not merely stoppers; they are genuine goal threats every time the ball is floated into the box.

Chelsea refused to go quietly despite their numerical disadvantage. Liam Delap thought he had snatched a dramatic equaliser in the closing stages, only for the linesman's flag to cut the celebrations short. The goal was ruled out for offside, and moments later David Raya produced a brilliant save to preserve Arsenal's lead, tipping a fierce effort around the post with an acrobatic dive that drew gasps from the crowd.

When the final whistle blew, the Emirates erupted. Arsenal's five-point cushion has been restored, and the message to their title rivals is unmistakable: this team knows how to win ugly when it matters most. Chelsea, meanwhile, are left to lick their wounds and rue the indiscipline that cost them dearly on a frustrating afternoon in north London.