Where Liverpool v Dortmund will be decided

After an entertaining first leg, Thomas Tuchel's Borussia Dortmund and Jürgen Klopp's Liverpool are level at 1-1 in their UEFA Europa League quarter-final. UEFA.com picks out the key marginals for the Anfield decider.

Can Liverpool's defence stifle Dortmund again?
Liverpool's back four was outstanding in Dortmund. At the heart of the defence, Dejan Lovren and Mamadou Sakho were commanding and perfectly positioned, while full-backs Nathaniel Clyne and Alberto Moreno were industrious throughout. For his part, Simon Mignolet looked impressive between the sticks and could do little about Mats Hummels' equaliser.

If the Merseysiders' rearguard can produce a similar display on home turf and prevent Henrikh Mkhitaryan, Pierre-Emerick Aubameyang and Marco Reus adding to their combined 75 goals this season (UEFA Europa League qualifying included), then Liverpool will make it to their first European semi-final since 2009/10.

Who will Klopp choose up front? 
Dortmund's firepower is eye-catching and rightly feared, but so increasingly is Liverpool's. Klopp chose to start Divock Origi over Daniel Sturridge in Dortmund and was rewarded in the 36th minute when the young Belgian shrugged off his marker and slotted past Roman Weidenfeller to score what could be a crucial away goal.

"It was nothing about Daniel," Klopp insisted as he explained his decision to plump for Origi. "[Sturridge] has played the last games, it is completely normal." Sturridge appeared sharp when he came on in the closing stages, while the return of Roberto Firmino from a thigh injury offers Klopp another high-calibre attacking option for the second leg.

Divock Origi celebrates his goal©Getty Images

How important will Origi's away goal be?
Dortmund and Liverpool seemed well matched on Thursday despite the disparity between their domestic league positions – Dortmund are second in Germany and assured of at least a UEFA Champions League qualifying berth, while the Reds are ninth in England. In what will likely be another tight, tense encounter at Anfield, Origi's first-half strike in Germany may grow in significance.

"An away goal is really good and 100% better than a 0-0," said Klopp. "But we have to play at our best in the rematch." Dortmund coach Tuchel, however, downplayed the significance of Liverpool's opener: "We can score away goals too, and we can score more than one."

Could Liverpool's home strength prove telling?
Anfield tends to be a European fortress for Liverpool, with this season no exception. The Reds have let in only three goals in five UEFA Europa League matches (W3 D2) on home turf this term, beating Augsburg and then fierce rivals Manchester United in the knockout rounds without conceding. Indeed, the three-time winners of this competition have never lost to a German club at Anfield (W12 D3).

That record faces one of its sternest tests yet, however, when Dortmund roll into town next Thursday. BVB have already defeated Porto and Tottenham Hotspur on the road in the last two rounds, and Tuchel was feeling bullish. "We are not frightened," he said. "We have been to a lot of places and scored and won."