Premier League: 10 talking points from the weekend’s action

It is unfair to pick out one player from Manchester United’s dire opening display under Erik ten Hag but Lisandro Martínez seriously struggled against Brighton. These are, of course, the earliest of days for the new centre-back but he will have to learn fast. The diminutive Argentinian is a footballer the manager knows well but there are question marks over his stature. There will be serial aerial bombardment this season of the type he failed to deal with against Brighton, with Danny Welbeck rising highest above him when missing a close-range header in the second half. Martínez might also have conceded a penalty when bundling over the same player in a performance that did nothing to suggest the 24-year-old can help plug United’s leaky rearguard. Jamie Jackson

Match report: Manchester United 1-2 Brighton

Jürgen Klopp threw the question of whether Virgil van Dijk had actually committed a penalty-conceding foul on Aleksandar Mitrovic to the press corps. He also wondered aloud whether Jordan Henderson had been fouled in the buildup to Mitrovic’s first goal. He still had few quibbles about escaping Craven Cottage with a point. “It’s my responsibility to find out why,” he said. His experienced players had been most culpable. Mitrovic terrorised Van Dijk, Fulham’s striker also reintroducing those questions about Trent Alexander-Arnold’s defending. The full-back flinched as Mitrovic crashed in on the back post. Henderson struggled with Andreas Pereira and João Palhinha in midfield, Roberto Firmino flopped in attack. The positive was Darwin Núñez’s energy reviving Liverpool after replacing Firmino, aided by two former Fulham players in Harvey Elliott and Fabio Carvalho. Might Liverpool’s old guard be suffering a hangover from