Dembele says Spurs fans want to see his Belgium teammate named club captain.
"The fans on the street say that he should be the leader here," said Dembele.
"His performances have earned him much respect. But it's normal for him to be not as loud here in the locker room as he was in Amsterdam. It's only January.
"But as we walk down the street, supporters come up spontaneously to say he should be the captain. And that's not a joke."