Harry Maguire accepted that it was "not good enough" for Manchester United to find themselves 2-0 down at half-time following Sunday's 2-1 defeat to Brighton in their Premier League opener at Old Trafford.
After making a reasonably encouraging start to the contest, United fell a goal behind on the half-hour mark, with old nemesis Pascal Gross tapping home from close quarters after connecting with Danny Welbeck's low cross.
United barely had any time to reset themselves before Gross added a second, doubling the Seagulls' lead nine minutes later. It meant that United faced an uphill struggle before they had even reached half-time.
They did pull a goal back midway through the second half, benefiting from an Alexis Mac Allister's own-goal, but it was not enough for Erik ten Hag to avoid a defeat in his first game in charge. READ MORE: United player ratings following Brighton defeat For Maguire, who started at centre-back alongside summer signing Lisandro Martinez, the result was unacceptable, highlighting how he and his teammates must improve moving forward.