West Ham made a late move for the player last month but that interest was firmly knocked back.
The Brazilian has scored 14 goals and provided 11 assists in his 49 league games for Leeds since his arrival in October 2020. He has also gone on to make his international debut since becoming a United player.
With Liverpool and Bayern Munich previously linked with the 25-year-old, Leeds are seeking to agree an improved deal with the winger.
Raphinha is leaving the discussions to his agent and dad, as he wants to focus on doing his best for the Whites.
“I’ve got a contract until 2024, my head is totally here and focused on Leeds,” he told BBC Radio Leeds.
“As for contractual matters, I leave them to my agent and my dad.
“I just focus on playing my football and making the Leeds fans happy, scoring goals, providing assists and getting victories for the team.
“Contractual matters are for my agent, my focus is on making people happy with my football and doing as best as I can for Leeds.”