Borlée also takes part in the Belgian 4 × 400 m relay team. The team won gold at the 2012, 2016 and 2018 European Championships, and the 2015 European Indoor Championships. The team finished 4th at the 2008 Summer Olympics and at the 2016 Summer Olympics and won silver at the 2010 World Indoor Championships and bronze at the 2010 European Championships.