Terrance Boyd stunned the visitors with the opening goal in the 21st minute .
Raphael Guerreiro managed to find an equaliser for Thomas Tuchel 's side on the stroke of half - time .
Terrance Boyd stunned the visitors with the opening goal in the 21st minute , but Raphael Guerreiro managed to find an equaliser for Thomas Tuchel 's side on the stroke of half - time .