Arsenal keep winning through substitutes and crosses rather than craft, and Gabriel Martinelli's finishing for Al-Hilal raises a question about what Mikel Arteta gave up when he let him go.
Alexander Isak scored his third straight Premier League away winner at Brentford, and the underlying numbers show a striker now shooting from far better positions than last season.
Noni Madueke's deflected strike settled a scrappy City Ground contest, handing Nottingham Forest a third straight defeat and deepening Oliver Glasner's home-form puzzle.
Diego Gómez's halfway-line strike headlined a ruthless Brighton performance that extended an already remarkable scoring run and left Crystal Palace's defensive problems exposed.
Opta data makes Arsenal strong favourites against Nottingham Forest, yet underlying stats show Oliver Glasner's side creating chances even in defeat, while Arsenal's own attack carries its own questions.
Liverpool overturned Keane Lewis-Potter's opener to win 2-1 after Brentford lost two players to red cards, with Alexander Isak scoring on his comeback from injury.
Xabi Alonso's side arrive at Hill Dickinson Stadium with the division's leakiest defence and its sharpest early-game attack, against an Everton side still searching for consistent conversion.
City's first home game since being found guilty of breaching finance rules ended in a 4-2 Champions League defeat to Pep Guardiola's Paris Saint-Germain.
Andoni Iraola says Leoni's return to first-team training has slipped by a month, a delay that keeps Liverpool short of options at centre-back heading into a congested run of fixtures.
Viktor Gyokeres has fallen behind Kai Havertz in Mikel Arteta's pecking order, and the six strikers Arsenal weighed up before signing him show how differently that decision could have gone.