He told MUTV: "I think they're both excellent footballers I really do. They have great enthusiasm and desire to play the game. It's a typical Brazilian situation and they just love playing.
"They're determined and quick, good footballers. What we don't know is their game appreciation as they've not played for a year because of the situation with their old club Fluminense as they didn't play them because they were joining us.
"Then they joined us in January and, of course, it was too late for the work permit, for the application. Their 18th birthdays meant we could apply for international clearance, which we got a couple of days ago.
"I'm delighted for the kids. They've worked so hard every training session and never missed a session."