Manager Roberto Martinez feels Swansea's 2-0 victory over Reading is a proud moment for the club.
The two sides were two divisions apart last season but goals by Jason Scotland and Andrea Orlandi at the end of each half gave the Swans a comfortable victory.
That stretched Swansea's unbeaten league run to 10 matches and, coming against a side firmly in the battle for automatic promotion, marks them out as promotion hopefuls themselves.
The South Wales outfit now lie ninth in the Championship, just four points off the play-off places, and Martinez sees no reason why his side should not now target top-flight football.
That is a mark of how far Swansea have come having only returned to the second division for the first time in 24 years this season.
"It was a big football occasion for Swansea City against a premier class side in Reading and I'm very proud of all my players," he said.
"Reading will almost certainly be one of the promoted teams this year so to win in such a fashion is a huge boost for the club and to get 40 points at this stage of the season is a wonderful return.
"The players have taken on the responsibility and they have a winning mentality but we had no experience of life in the Championship and playing so well against a side like Reading can only give us the confidence to go on a stage further.
"We restricted them to just one chance and though our results have not always told the full story, today we were well worth the victory."
Reading missed out on the chance to go within one point of leaders Wolves and manager Steve Coppell admitted he should have opted for a more cautious gameplan.
"I should have been more conservative and got more men behind the ball as a lot of other teams would have done but I like my teams to go forward," he said.
"It is hard to accept that they were the better team but we were open, never shut up shop, and it didn't work for us."