By ESPNSTAR.com staff
After finishing fourth in the Bundesliga last term, Gladbach have struggled for form so far in the current campaign and - prior to Sunday - had not won seen the first weekend of the season.
Nonetheless, first-half goals from Juan Arango and De Jong brought an end to that disappointing run of form, something the latter feels was absolutely vital.
"It's a good feeling," De Jong told Bundesliga.com. "We're pleased that we won today [Sunday].
"Leading 2-0 at half-time gave us a lot of confidence. It wasn't an easy game but we were compact and hardly let them have any good chances to score, and we grabbed two ourselves.
"We needed this win - it was important. Our last few games didn't go as planned so this win will give the whole team confidence again."
De Jong, who was also on the scoresheet in last Thursday's 4-2 loss to Fenerbahce in the Europa League, insists his goals mean nothing if they don't help Gladbach win on the day.
"It's always nice to score but it's worthless if I score and we lost the game," the Netherlands international added.
"But I'm a striker, so of course I'm pleased when he ball hits the net."
The 22-year-old joined Gladbach from Twente in the summer and was part of the Dutch squad that took part at Euro 2012.