"The damage of this game cannot last until after Thursday," Sporting manager Paulo Bento said following Wednesday's 5-0 home thumping by the Germans in their last-16, first-leg game.
"We will see who will hide for the game against Porto. I will be ready and hope the players are ready with me."
"We will have to show a different mental attitude than the one we showed against Bayern," he added.
"The game is not decisive for Porto, but it is for Sporting since if we win it is unlikely we will lose more than seven points in relation to them until the end of the season," Porto captain Lucho Gonzalez said.
Moves for the two young players are likely to be discussed at the end of this season, as Sporting's model is to produce talent it can sell to richer clubs.
Porto had a less traumatic Champions League night, and will take spirit from an impressive performance in the 2-2 draw at Atletico Madrid. Argentine striker Lisandro Lopez scored both of Porto's goals.
"The draw tasted like a defeat, but it was our best performance of the season, with a high tempo for 90 minutes," coach Jesualdo Ferreira said.
