The former Swansea and Everton boss says their “incredible" energy and could create problems for Belgium.

"We faced Japan not long ago in a friendly. I think in essence the team is exactly the same, footballers with an incredible, incredible energy," he said.

"I expect a very tough game, a game that we'll have to be concentrated at all times because they  are capable of creating problems."

The 44-year-old added that Belgium are not underestimating their opponents and said the match could go all the way to the penalty shootout.

Belgium, who won all three of their group-stage games, are set to face Group H runners-up Japan in their round of 16 match at the Rostov Arena on Monday.