A stunning first-half performance from Sebastien Haller helped Borussia Dortmund move back within a point of Bundesliga leaders Bayern Munich with two matches remaining after a 5-2 thrashing of Borussia Moenchengladbach on Saturday. After Bayern demolished Schalke 6-0 earlier in the day, Dortmund struck four times in the opening 32 minutes against Gladbach, with Haller having a hand in each of the goals. "We showed today that we will keep believing until the end and we will chase everything until the end," said Dortmund coach Edin Terzic.