The Blues claimed a comfortable win over the Gunners as goals from Marcos Alonso, Eden Hazard and Cesc Fabregas wrapped up the three points for the home side.
The victory left Chelsea flying high and nine points clear at the top of the Premier League table as they bid to win the title in Antonio Conte’s first season at the club.
Arsenal, meanwhile, are now 12 points behind the leaders and look to be all but out of the top-flight title race.
Pedro was clearly thrilled by the win and took to Instagram after the game to celebrate the result.
Pedro posted the picture above on the photo-sharing app and wrote the caption: “Another step forward winning Arsenal . Keep on going! @chelseafc #CHEARS 💪”
Chelsea finished 10th and without a trophy last season. The Blues travel to Turf Moor to take on Burnley next weekend.
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