Brown fears for Leeds as they face losing Kalvin Phillips and Raphinha.
"If Kalvin Phillips and Raphinha both leave Leeds this summer, I would worry about their chances for survival next season as they're both difficult to replace. Last season went all the way to the last day." Brown said, speaking ahead of the 360 Sports TV Masters Cup.
“Raphinha is skilful, he gets at you, and he has the end product. He's that special player, that exciting player that fans look to see. When he gets on the ball, you're not sure what he's going to do.
“He's exciting for Leeds, he is probably that one player that maybe could win a game on his own. If he plays well and he's got his shooting boots on, he'll get you goals and assists. They will miss him and Phillips massively. We've seen how he plays for Leeds but a lot for England as well. You can see him play at that higher level; he does the naughty work. He gets about, he gets stuck in, and Phillips does his job tremendously."