VfB Stuttgart will not attack all-out from the kick-off when they aim to overturn a 2-1 home defeat against Porto on Thursday on the Europa League last 16 return leg.

Coach Sebastian Hoeness said on Wednesday that "in theory you don't have to make up deficits in the first 10 minutes.

"Of course it helps to create an early momentum. But it is a long game. We have to be clean, smart and emotional - show all aspects it takes in such a match," Hoeness said.

Stuttgart's Germany striker Deniz Undav named the match "the first real final" since they won the German Cup last year.

"The team is on fire, we all want to advance - victory is all that counts," Undav said.

Josha Vagnoman is back in the squad and Jamie Leweling is also fit to play as Stuttgart aim to reach a European quarter-final for the first time since they reached the Cup Winners' Cup final in 1998.

Former finalists Braga stormed into the Europa League quarter-finals with a 4-0 victory over Ferencvaros on Wednesday as they comfortably overcame a two-goal deficit from the first leg in Hungary.

Braga needed just 15 minutes at home in Portugal to cancel out last week's 2-0 defeat as Ricardo Horta tapped home at the far post and Florian Grillitsch was on target from the edge of the area.

Gabri Martinez' low effort made it 3-0 in the 37th and Horta made the tie safe for a 4-2 aggregate win eight minutes after the restart with his second goal, a curling effort in off the post.

In the quarter-finals on April 9 and 16, Braga will play either Real Betis of Spain or Athens club Panathinaikos. They play their second leg last 16 match along with the six other ties on Thursday.

The Braga v Ferencvaros match was moved forward a day for safety reasons because Porto and Braga are only 50 kilometres apart and they shouldn't play at the same time. Porto play VfB Stuttgart on Thursday.