The playoff final will be held at Wembley Stadium on May 26.
Steve Bruce's side are one match away from returning to the Premier League from which they were relegated in 2016.
"As a one-off it's fantastic if you go up through the play-offs, although I would love to have been second and sitting on a beach now".
"We've just shaded it over the two games".
At the heart of that defence was former Chelsea and England centre back John Terry who joined the club a year ago on a free transfer and whose appointment as captain appears to have had a significant impact. The support from the lads, the dressing room is incredible.
Putin drives Kamaz truck across newly-opened Crimean bridge
Many in Russia saw the bridge as a move toward restoring Moscow's rule over a historically Russian region. At the other end of the 19-kilometer bridge, in Crimea, Putin attended a brief open air show.
"Great team spirit amongst the boys and like I said before, one more step and it will be the dream".
Middlesbrough hadn't even produced a shot on target until a controversial moment three minutes from time.
Randolph then came to the fore as he made two fine saves from Lewis Grabban before getting fingertips to a long-range effort from Jack Grealish.
Boss Tony Pulis, who replaced Garry Monk in December, was upset Villa goalkeeper Sam Johnstone was not sent off by referee Mike Dean after he handled outside the area with three minutes left.
"The teams that have finished third and fourth over a season have got to Wembley and that's justification, if anything", Pulis told Sky Sports.