The Dane could make his FA Cup debut for United in Monday night’s third-round tie away to Wigan.
Casemiro has backed Rasmus Hojlund to write his name into Manchester United history during his time at the club.
Hojlund, 20, could make his FA Cup debut for United in Monday night’s third-round tie away to Wigan, having broken his Premier League duck with a match-winning goal in the 3-2 victory over Aston Villa on Boxing Day.
Hojlund finished United’s ill-fated Champions League campaign as their top scorer but endured a frustrating 14-game wait for his league goal, with the relief evident in his celebrations as United came from 2-0 down to claim victory.
That had led many to question whether the youthful Hojlund was ready to lead United’s line, but the hugely experienced Casemiro is convinced he can enjoy a long and successful career at Old Trafford.
“At the end of the day, he’s just a kid, so we shouldn’t be putting a lot of pressure on him,” the Brazil midfielder said on the club website. “A lot of people think that he should be coming in and scoring 30-odd goals right away.
“He’s still young and this is his first season in the Premier League.”
Casemiro, who is close to a return from injury, pointed to Hojlund’s debut against Arsenal back in September, when his front-foot approach clearly ruffled the Gunners defence.
“I was really happy with his attitude,” Casemiro said. “The thing is, it’s really difficult when you come on in such a demanding game, as games against Arsenal are.
“When he entered the fray he contributed a lot, changing our dynamic, so I tried to express to him just how I was feeling.
“He’s definitely playing better in every game and he’s working really hard. Rasmus is a dedicated lad and he’s keen to kick on.
“He’ll be a great player for this club and, with the ambitions he has, he could define an era at Manchester United.”
Hojlund missed United’s 2-1 defeat away to Nottingham Forest last time out through illness, but will be available for Monday’s match at the DW Stadium.