A question for the statos on here

When we won the playoffs against Bristol City and QPR to get promoted to the Championship we were the only side that had gone through both matches in any playoff without conceding a goal.(Memories )

Has anyone done this since and if so who and when ?

pretty sure Palace did the year we won the championship after just about crawling into the play offs..1 win in their last 10 games...so much for form teams winning them..