Dortmund issued early European warning after surrender at Lazio

FILE PHOTO: Soccer Football - Champions League - Group F - Lazio v Borussia Dortmund - Stadio Olimpico, Rome, Italy - October 20, 2020 Borussia Dortmund's Marco Reus and Erling Haaland look dejected REUTERS/Alberto Lingria/File Photo

BERLIN (Reuters) - Borussia Dortmund returned from Rome with a black eye following Tuesday's 3-1 loss to Lazio in the Champions League, a stern warning that they must shape up quickly or face an early exit from Europe's elite club competition.

The Germans, finalists in 2013, hardly put up a fight and their only glimmer of hope of getting something from the match was when Erling Haaland cut the deficit to 2-1 in the 71st minute.