The 22-year-old forward signed for the Championship leaders on loan from German outfit RB Leipzig on Monday.
He told the Mirror: "I had already made my decision as a player this was the best plan and project.
"We looked at videos of Leeds and I could see this was my style. Pressing high, good in possession and working hard. We thought I would fit in nicely. Things happened quickly.
"I didn't have to think more than a second about coming here. I decided to play for Leeds straight away.
"I had one or two other clubs interested. I didn't want to go anywhere just for the sake of it, I wanted to play and to have clear aims and objectives for the season like Leeds have.
"It wasn't a case of turning Man U down it was a case of I had already made my decision."