United have chosen not to exercise this, leaving Casemiro free to pursue opportunities elsewhere. Casemiro transferred to Manchester from Real Madrid in 2022 and initially proved an enormous success. He experienced a decline the subsequent year, but has rediscovered his best form and features regularly once more as the Red Devils surge up the table in recent weeks.
The 34-year-old arrived in England following a trophy-laden spell with Real Madrid, where he secured numerous Champions League titles, and that winning pedigree was viewed as an enormous asset for a United side who had endured years without silverware. Consequently, Mazraoui was disappointed to see Casemiro's departure confirmed and maintains the club will need to fill a substantial void regarding delivering success at the elite level.
He said: "I think the announcement, when I saw it, was like... it was a sad day. He brings experience, like crazy. He knows how it is to win. He knows how it is, also, the road to win, because he has done it, he has lived it. So, yeah, we're going to miss him a lot in the team, outside of the pitch, inside the pitch, of course."
The Brazilian notched his sixth Premier League goal of the campaign during their 2-1 defeat to Newcastle - eclipsing his finest tally whilst in Manchester. He sits just one strike away from his best return across all competitions, though his departure will undoubtedly intensify the club's pursuit of fresh midfield reinforcements - their principal summer priority.
Whether Michael Carrick remains at United's helm by then remains uncertain, yet he has lavished praise upon the Brazilian's contributions. "Yeah, I've got to say, Case has been fantastic since I came in, really, on and off the pitch," he remarked recently. "Experience is a great thing if you use it in the right way.
"And again, I think over time, being a senior player here is almost the responsibility of the example and helping the young players, helping the rest of the boys and passing on your experiences in a positive way. He's been top since I came in, in so many ways, and he's been a pleasure to work with, and I look forward to continuing with him for a few months yet."