The 32-year-old has another two years left to run on his contract with the Red Devils, while there is an option to extend his agreement until the summer of 2027.
Casemiro has again been an important player for Man United this season despite some injury problems, featuring on 25 occasions in all competitions, scoring five goals and registering three assists.
There has been talk of a potential summer departure, with clubs from Saudi Arabia said to be keeping a close eye on his situation in Manchester.
However, Ten Hag, who is also facing an uncertain future at Old Trafford, has hinted that the Brazil captain will be staying at the club for the foreseeable future.
Erik ten Hag hints at Casemiro stay this summer«I think we needed a six [defensive midfielder] when I arrived here and, last season, Casemiro was fantastic. I don't think he ever scored so many goals as well,» Ten Hag told reporters on Friday.
«But as a six, as a holding midfielder, as a strategist, he was so important for the team. This season, he struggled with some bad injuries, he never had this in his career. But I know he is such a winner.
»See his career, all his career he always won. Everywhere where he was, there will be success. And I trust he will give us also the success, and I know he needs games and he will be better.
«I'm very confident about him, he's a fighter, that's why he won the big trophies. He's a personality, and he's a very important player for us and, as I say, he will give us success.»
Ten Hag also addressed Christian Eriksen's lack of action this season, with the Denmark
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