Arsenal continually caused chaos in the first half and Mikel Arteta's side led 3-0 at the break as a brace from Gabriel Martinelli was followed by a Bukayo Saka strike.
Leeds improved after the break and Joe Gelhardt earned the Whites a 75th-minute penalty after being fouled by Ben White, Raphinha blasting home the spot kick into the top right corner.
But Arsenal bagged a fourth goal with six minutes left when Martin Odegaard played in substitute Emile Smith Rowe who volleyed home past Illan Meslier.
Graham Smyth, the YEP's chief football writer, hands out the scores.
. Leeds United were beaten 4-1 by Saturday night's Premier League visitors Arsenal at Elland Road.
SOLE REPLY: Raphinha pulls a goal back for Leeds United against Arsenal from the penalty spot. Picture by Bruce Rollinson.
. Illan Meslier
8 - Had it not been for the keeper Leeds would have been facing an Ethiad-level humiliation in the first half. Picture by Bruce Rollinson.
. Cody Drameh
5 - Showed willingness to get forward and a few nice tackles but struggled to contain runners when Leeds were stretched. Photo by Naomi Baker/Getty Images.
. Luke Ayling
4 - Couldn't keep the defence intact and organised when the midfield lost the ball. Below par but may not have 100 per cent ahead of the game. Photo by Laurence Griffiths/Getty Images.
. Robin Koch
4 - Runners got in behind him too easily. Defending wasn't easy in the first half but looked rusty. Picture by Bruce Rollinson.
1. Illan Meslier
8 - Had it not been for the keeper Leeds would have been facing an Ethiad-level humiliation in the first half. Picture by Bruce Rollinson.
2. Cody Drameh
5 - Showed willingness to get forward and a few nice tackles but struggled to contain runners when Leeds were stretched. Photo by Naomi Baker/Getty Images.
3. Luke Ayling
4 - Couldn't keep the defence intact and organised when the midfield lost the ball. Below par but may not have 100 per cent ahead of the game. Photo by Laurence Griffiths/Getty Images.
4. Robin Koch
4 - Runners got in behind him too easily. Defending wasn't easy in the first half but looked rusty. Picture by Bruce Rollinson.
5. Stuart Dallas
4 - Better in the second half than the first when he was poor. Unable to give Leeds much forward momentum. Took a whack to the ribs that hampered him. Photo by George Wood/Getty Images.
6. Adam Forshaw
4 - Poor touch under pressure contributed to a goal. Showed some fight and tried to get Leeds playing but the midfield looked overrun in the first half. Picture by Bruce Rollinson.