I think the Champions League Final this time will be very fierce for El-Real, considering that Dortmund's defense is difficult to penetrate and has conceded fewer goals than Real Madrid, and it is very likely that there will be extra rounds, or even a penalty shootout to win.
Dortmund is facing an uphill battle against Real Madrid, considering Real Madrid really plays well and if so, Dortmund won't have much of a chance to lift the Trophy.
By scoring an early goal, Dortmund can put some pressure on Real Madrid and make a surprise result happen.
But we all know how difficult it will be for Dortmund to make Real concede an early goal.
I personally believe Real Madrid will dominate thematch by having high ball possession and thus, of course, Real Madrid will continue to attack and have high goal attempts. But yes, if Real Madrid make a mistake then of course it is still possible for Dortmund to make a counterattack to score first. If so, then ofcourse Dortmund will play more defensively when Dortmund have won the score, for example 1-0. But indeed,of course, if Dortmund make a mistake, it will also be well utilized by Real Madrid. So, although Dortmund will play defensively, but at least there is no guarantee thatDortmund will be able to hold Real Madrid to a draw during the match.