Javi Gracia’s Whites went close after just ten seconds as Rasmus Kristensen found space towards the right hand edge of the area and unleashed a drive which Gunners keeper Aaron Ramsdale saved.
Gabriel Jesus then sent a free header over the bar for the hosts but Leeds squandered further chances through Crysencio Summerville and Jack Harrison only to then concede a penalty as Luke Ayling fouled Gabriel Jesus who converted in sending Illan Meslier the wrong way.
Mikel Arteta’s league leaders took a 1-0 advantage into the break and the Gunners doubled their lead just two minutes into the second half as former Whites loanee Ben White converted a cross from Gabriel Martinelli with a strike that flew past Meslier in off the bar.
Jesus then smashed home his second and Arsenal’s third in the 55th minute before Leeds pulled a goal back with 14 minutes remaining through Kristensen who beat Ramsdale with a deflected side-footed strike from just outside of the box. But the Gunners added a fourth goal with six minutes left when Granit Xhaka escaped Ayling before heading past Meslier as United’s goal difference took a hit along with the defeat.
Graham Smyth, the YEP’s chief football writer, hands out the scores from a defeat which left Leeds fifth-bottom and just one point clear of the drop zone following a victory for relegation rivals Bournemouth and a point for Nottingham Forest.