A last-minute strike from James McPake salvaged a draw for Dundee in a pulsating derby at Tannadice.
Two second-half goals in two minutes from United’s Blair Spittal had the Terrors firmly in control of the contest.
However, a wonderful effort from Greg Stewart from the edge of the box set up a thrilling finale.
Scott Bain then pulled off a stunning save to deny Simon Murray a third before McPake went up the other end and fired the ball beyond Zwick deep into stoppage time to level the scores.
Overall, a draw was probably a fair result but Dundee United boss Jackie McNamara would have been disappointed at squandering a two-goal lead.
There is a feeling around certain parts of the city of a power shift between these two sides after United losing three of their best players and the Dark Blues gradual improvement under Paul Hartley.
And the evidence in the opening 45 minutes certainly suggested as much as the visitors were the better side.
However, United took a stranglehold of the game with a quick-fire double.
Spittal demonstrated a great piece of skill to skip away from McPake on the edge of the box before toe-poking the ball under Bain.
The 19-year-old barely had time to take stock of what he had done before he doubled their advantage.
A great through-ball from Chris Erskine found Spittal in behind Dark Blues defender John McGinn and the attacker coolly slotted past Bain for his second.
Dundee looked to be reeling from the quick one-two but United never found a third to kill the game off completely despite Spittal’s best efforts.
Stewart, though, halved the deficit with a piece of individual brilliance that he is so capable of producing with his left foot.
He engineered space away from Paul Dixon before curling the ball into the top corner beyond the despairing dive of Louis Zwick.
The action wasn’t over. Substitute Simon Murray skipped and weaved past a couple of United defenders and drove a shot towards goal but Bain somehow managed to push his shot on to the bar.
That was to prove vital as just a minute later Gary Harkins muscled Charlie Telfer off the ball before fizzing a shot at the target; Zwick was unable to collect and McPake slid in to make it 2-2 and grab a share of the spoils.