At the beginning of 2010, the Borlée-twins were back in shape. At the 2010 World Indoor Championships, the 4 × 400 m relay team with teammates Nils Duerinck and Antoine Gillet, they won their heat in 3:09.84s, a national indoor record. In the final, with Cédric Van Branteghem instead of Nils Duerinck, they won silver with a time 3:06.94s, another national record. It was the first time a Belgian relay team had ever delivered such a performance.