Pochettino sees no reason why Sean Dyche's team can't finish in the top four and qualify for the Champions League.
"Look, two years ago, Leicester can win the Premier League and, in the end, they won the Premier League," he said.
"In football, all can happen. They are so tough, such a physical team. They play simple but it's difficult sometimes to play simple as well as they do.
"We need to be ready to fight because they are such athletic players, tough players, and they manage the long ball so well with two or three big strikers.
"It doesn't surprise me that they are doing so well because they have good quality."