But not everyone was present for the first day of pre-season, because those involved in international fixtures through late May and early June have been given a later return date.
Among that number is Bruno Fernandes, who made four Nations League appearances for Portugal following the close of United's 2021/22 season.
But barely two weeks after his most recent game – an away trip to face Switzerland – our popular no.18 is already back at it, working hard on his fitness as a recent Instagram post revealed.
The image shows the playmaker in fine shape ahead of a crucial season, as Ten Hag aims to improve on the sixth-place finish United achieved last term.