But he was ultimately disappointed with a 2-2 draw.
The Seagulls trailed twice but levelled through Kaoru Mitoma and then, amid high tension around the stadium, Georginio Rutter.
Right-back Wieffer said: “I think the 2-1 came out of nowhere but we still had the feeling that we could score because they are not in a really good position at the moment, as everybody knows.
“In the last ten minutes you saw already the 2-2 was a little bit coming.
“We scored it and, in the end, we had also chances with the corner to get the 3-2.
“In the end, if it is deserved, I don’t know, but we wanted more.”
Ferdi Kadioglu almost levelled for Albion just before Rutter struck with home nerves on edge and their tiring team sitting back.
Wieffer said: “You see they are going to drop. They try to be in the 16 (penalty area) so we can pay around.
“Maybe a lack of confidence, a little bit. We keep pressure, pressure, pressure and one ball can fall well and it happened for us to make it 2-2.”
Asked the mood in the Albion changing room, Wieffer said: “Of course, disappointed. We had a couple of good moments, good actions in the first half. Second half as well.
“But, overall, it was not exactly as we wanted to play, I think.”