
Showing support. Dortmund′s players wore T-shirts with 'Mucha Fuerza' (A lot of strength) and a picture of teammate Marc Bartra -- injured in the bomb attack on Dortmund's team bus -- on the front.

Dortmund fans displayed a banner with a message to their Spanish defender, who underwent surgery on his injured arm and hand, which read "Get well Marc."

Dortmund's famed 'yellow wall' -- Europe's largest free standing terrace which holds 25,000 fans -- was subdued in the first half as Dortmund struggled against Monaco in their Champions League first-leg tie.

What a miss! Monaco defender Fabinho screwed a penalty wide, squandering a chance to put Monaco ahead after 17 minutes, following a foul by Sokratis Papastathopoulos on Kylian Mbappe.

From bad to worse. Dortmund's Sven Bender scored an own goal, heading Andrea Raggi's cross into his own net, as the German side fell 2-0 behind in the first half.

Eighteen-year-old striker Kylian Mbappe was Monaco's star man, becoming the youngest player to score two goals in the knockout stages of the Champions League.

Shinji Kagawa scored late for Dortmund, giving the Germans hope heading into next week's return fixture in Monaco.

Monaco fans -- praised for their show of support to Dortmund following Tuesday's attack -- celebrated after Mbappe scored his team's third goal -- a brilliant long-range strike into the top corner.

Sokratis cut a dejected figure at fulltime after Dortmund suffered a first home defeat in 21 games.

Dortmund's subdued start was understandable given that three explosive devices shattered windows and injured a player on the team bus as the German squad was en route to its home Champions League quarterfinal against AS Monaco Tuesday.

German authorities said earlier on Wednesday that they suspect "terrorist involvement" and were investigating a possible radical Islamist link.

Spanish defender Bartra, 26, suffered injuries which required surgery. He posted on social media Wednesday thanking fans for their support and said: "I am doing much better."

Following the announcement that Tuesday's match had been rescheduled to Wednesday, the away supporters began singing and waving flags in support of their rivals.

Outside Dortmund's training ground Wednesday, four fans held a sign in support of their team which read "You'll Never Walk Alone" -- which is the title of the club's anthem.

Policemen stood guard in front of a Monaco team bus Wednesday before the rescheduled Champions League encounter as security was tightened.

Before the match, Dortmund said it would "not bend before terror" and hours before kickoff police sniffer dogs checked inside the stadium.

There was heavy police presence in the city and Dortmund's team coach was escorted by police as it arrived for the rescheduled match.