Dungannon 17 Belfast High 17
A last play of the tie gave Belfast High a draw and a home replay against Dungannon Royal at Shore Road on Wednesday.
But Dungannon will be without their captain Jacob McCammon who broke his ankle in the first half.
Dungannon coach Keith Patton admitted the loss of McCammon is a major setback.
“We will miss Jacob on Wednesday when hopefully we will perform better,” he said.
“Thankfully the final conversion missed and we have been given another chance but it should never have been like that.
“With 10 minutes remaining we were on their line and unfortunately we just didn't have the experience to close the game out.
“Overall, I would class our effort as average.”
Mickey Rainey, the High School coach, admitted his team had “got out of jail”.
He said: “We left it to the last move of the game and are fortunate to have gained a replay.
“We dominated for the final nine minutes but throughout we played some decent rugby.
“Dungannon also played well with some intelligent work. They tackled strongly but it was a typical cup tie.”
Dungannon led 10-0 at the interval and extended it to 17-5 before Belfast High struck back with two late tries from Alan White.
The home team scored the only try of the first half, out-half John Buckley crossing under the posts for Jack Milligan to convert.
The High School reduced the arrears with a Matthew Connolly try. But from the drop-out High School erred and Dungannon were quick to take advantage, centre Matthew Montgomery going over for a converted try.