United remain unbeaten on the road in the Premier League and but for VAR the Blades would have deservedly beaten Tottenham at their new home.
Chris Wilder's side more than matched Spurs and despite falling behind netted a point courtesy of George Baldock's first of the season. But it could and should have been all three points, after David McGoldrick's goal was harshly chalked off.
For the clash in the capital, Wilder unsurprisingly kept faith with the matchday squad that was on duty against Burnley.
United were quickly on the front foot. Baldock was cynically fouled by Dier who was booked and from the resulting free-kick, Norwood's effort forced Gazzaniga into a smart save at the expense of a corner, before Mousset's pace won the Blades another, from which Lundstram dragged a shot wide. The visitors continued to control the opening exchanges and Gazzaniga was again called into action to deny Fleck, after McGoldrick had shown bravery in a challenge with Sanchez to fashion an opening.
On 15 minutes, Spurs should have taken the lead. The hosts advanced down the right, with Aurier finding Kane with the goal at his mercy, but under pressure from Egan, the England captain couldn't direct his effort on target. Moments later, O'Connell found space in the opposition, but his deflected cross broke kindly for the home side and Norwood was booked having caught Dele whilst trying to halt the counter.
The game was an open affair with both teams creating chances. This time it was United attacking, but Lundstram couldn't make a clean connection from an inviting cross by Stevens. The midfielder then came even closer in in the Blades next attack. Norwood's deep cross found O'Connell and from his pull back Lundstram struck a left-footed effort that rattled the woodwork with Gazzaniga stranded, before Mousset saw his effort blocked on the rebound.
Eight minutes before half-time, Spurs created another clear opportunity. From a Davies pass, Son got in behind the Blades and his pass was perfectly into the path of Lo Celso, but the Argentina international dragged an effort wide of the far post.
Again, it was the Blades who started the second half better and Mousset came so close to breaking the deadlock, holding off the attentions of Sanchez, before spinning his marker and powering an effort that literally was inches away from finding the far corner. At the other end, Henderson had to be alert and get his angles right to deny Son, after he had advanced through on goal.
But on 58 minutes it was the hosts who broke the deadlock in fortuitous circumstances. The Blades looked to have the situation covered as Spurs advanced into the box, but some indecision allowed SON time to swivel and force the ball past Henderson. Within two minutes though, United deservedly appeared to have restored parity as MCGOLDRICK tapped home at the back post from Stevens inch perfect low cross, only for it to be denied following an extremely long VAR stoppage, with the decision going against the Blades because of Lundstram's toe being offside in early in the build-up.
There were 12 minutes left to play when United levelled for a second time and despite another VAR check for offside, despite Basham not touching the ball, this time the goal stood! McGoldrick broke in field, fed it out wide to an advancing BALDOCK and his cross-cum-shot beat Gazzaniga and nestled nicely in the far corner, much to the delight of those of a red and white persuasion.
Robinson replaced Mousset with three minutes remaining, but the Blades were grateful to Henderson who claimed the ball after Son had beaten two defenders in the box. Six minutes of added time were signalled, much of which had come from the VAR stoppages and Basham was booked for a foul which stopped Son's momentum.
The clocking was ticking down, but Henderson was at his best to deny Lucas from distance, tipping over at the expense of a corner and United survived another from the right-wing to deservedly claim a share of the spoils in the capital.
Spurs: Gazzaniga, Aurier (Lucas 86), Dier, Sanchez, Davies, Sissoko, Ndombele (Winks 45), Lo Celso, Dele (Foyth 72), Son, Kane.
Unused: Vorm, Alderweireld, Sessegnon, Eriksen.
Blades: Henderson, Baldock, Stevens, Fleck, O'Connell, Basham, Lundstram, Egan, Norwood, McGoldrick (L. Freeman 90), Mousset (Robinson 87).
Unused: McBurnie, Sharp, Jagielka, Moore, Bešić.
As it happened...
Spurs kick-off and we're underway.
Yellow for Eric Dier for a late trip
Fleck free-kick cleared to edge of the area and Norwood's effort is tipped over the bar.
Resulting corner is drilled into the side netting. 0-0.
Good start by United, as the visitors win another corner.
This time it goes in low from Norwood into the near post. Spurs clear only as far as John Lundstram who drags his shot wide. 0-0.
Lovely link-up play between O'Connell, Stevens and Fleck wins United an attacking throw, from which a cross goes into the area and Spurs clear.
Half chance for the Blades.
United win the ball back deep inside Tottenham territory. After good work by McGoldrick it breaks for Fleck whose low drive from 20 yards is held. 0-0.
Dier can thank his lucky starts here.
Stevens plays a wonderful forward pass from deep which Mousset latches onto. He's bundled over by Dier who has already been booked. It is a stern word only though from the referee.
Big chance for Spurs.
Dele Alli sends the ball wide to Serge Aurier, he crosses into the area where Harry Kane puts it wide under pressure. 0-0.
Giovani Lo Celso sends an effort wide from distance. 0-0.
Norwood yellow carded after halted Alli who was threatening a Spurs counter-attack. 0-0.
Blades again win the ball inside the Tottenham half. Lundstram plays it into the feet of McGoldrick, he drives forward, but his low daisy-cutter is held. 0-0.
Son fires an effort well over from 25 yards. 0-0.
Ndombele with a low cross/shot which is deflected and well gathered by Henderson.
Chance for United!
Brilliant low cross by Stevens into the near post, Lundstram gets a touch on it but it slides just wide.
Tottenham again give the ball away, and Mousset drives forward striking towards goal. His effort is deflected behind, Spurs clear. 0-0.
Off the post!
Norwood cross, cut-back by O'Connell to the onrushing Lundstram who rifles an effort against the post. 0-0.
Good chance for Spurs.
Ben Davies with the defence splitting pass, cut back by Son, but Lo Celso shoots wide. 0-0.
One minute added.
Tottenham 0 - 0 Blades
Good performamce so far from United, Lundstram hits the post for the Blades.
We're underway again...
Change at half time for Spurs...
Harry Winks replaces Ndombele.
Mousset has a shot blocked as the Blades begin the second-half well. 0-0.
Lundstram and McGoldrick star in the build-up. The ball is played to Mousset who dances into the area, firing just wide of the far post. 0-0.
Henderson called into action.
Son with a low shot across goal from just inside the area, palmed away low down by the Blades stopper. 0-0.
Goal for Tottenham.
Son profits from a defensive error from Stevens to slide the ball through the legs of Henderson. 1-0.
Equaliser for the Blades. What a cross from Stevens, who puts in a low ball and McGoldrick taps in. 1-1.
Looks like we have some doubt here, it is maybe a toe offside in the build up against Lundstram. Goal ruled out, 1-0 Spurs.
Son goes down in the area, another VAR check, play on...
Tottenham change, Alli is off and Juan Foyth is on.
Quiet period in the game but the Blades still carrying a threat going forward. 1-0.
GOAL - WE THINK - FOR BLADES!!! 1-1.
Cross from Baldock has gone straight through and into the net.
VAR check again against Basham in the area...IT'S GIVEN - 1-1.
Foyth has been booked for Spurs.
Ball over the top looks to have Son through on goal but there's Basham who arrives in the nick of time to make a brilliant last ditch challenge. 1-1.
Lucas Moura replaces Aurier
Winks with a cross from deep just over the head of Kane. 1-1.
Sub for United as Callum Robinson replaces Mousset.
Son weaves his way through the challenges but drills an effort straight at Henderson. 1-1.
Six minutes added time.
Yellow card for Basham for a late challenge on Son.
Thunderbolt from Sissoko tipped over by Henderson. 1-1
Son corner, headed wide by Kane. 1-1.
Great performance by McGoldrick who is replaced by Luke Freeman.
Tottenham 1 - 1 Blades
Great performance by United who cancel out Son's opener through a goal from George Baldock.
McGoldrick has a striker ruled out by VAR.