Arsenal extended their lead at the top of the Premier League to five points as they thrashed struggling Everton at Emirates Stadium.
Sean Dyche's side, who remain in the relegation places, frustrated Arsenal until five minutes before half-time, when Oleksandr Zinchenko's pass played in Bukayo Saka for a thumping finish.
The contest was effectively over in first-half stoppage time when Saka robbed the dawdling Idrissa Gueye to play in Gabriel Martinelli. The flag went up for offside after he drove past Jordan Pickford but the decision was overturned after a VAR check.
Everton had no answers and Arsenal captain Martin Odegaard wrapped up their third successive league victory when he side-footed home Leandro Trossard's cross after 71 minutes.
It was now simply a question of how many Arsenal would score to improve their goal difference, Martinelli adding his second and the Gunners' fourth from Eddie Nketiah's cross ten minutes from time.
Gunners manager Mikel Arteta later said: "I am delighted with the win and the way we played after the first 25 minutes. We had some difficulties at the start. They are difficult to play against.
"Once we scored the first goal, the game unlocked. We needed a magic moment and Bukayo produced that. After that we grew and deserved to win the game.
"With the way they play, direct, second balls, a small lead isn't enough.
"We played really well in the second half and could have scored more.
"I am delighted when I see the team play the way we want to.
"This league is a different story [no easy games]. We had big proof of that at Goodison. They made it difficult for Liverpool too.
"I'm really happy with the maturity and quality we showed."
