Hugo Lloris saved Pierre-Emerick Aubameyang's penalty in injury time
Pierre-Emerick Aubameyang saw a last-minute penalty saved by Hugo Lloris to cost Arsenal victory and ensure Tottenham retained a crucial advantage over their arch-rivals in the battle for a top four place after a dramatic north London derby at Wembley.
Harry Kane's contested penalty put Spurs level with 16 minutes left after Aaron Ramsey's coolly-taken 16th-minute goal threatened to inflict a third successive league defeat on boss Mauricio Pochettino for the first time in his reign.
Arsenal were then handed a golden opportunity to close to within one point of Spurs after Davinson Sanchez fouled Aubameyang but the striker's tame penalty was easily saved low to his right by the diving Lloris.
And to add to the late chaos, Arsenal's Lucas Torreira was sent off for a reckless challenge on Danny Rose in the closing seconds.
After Ramsey's strike, keeper Bernd Leno kept Arsenal on level terms with a miraculous double save from Christian Eriksen and Moussa Sissoko but the Gunners paid a heavy price for a glaring second-half miss from striker Alexandre Lacazette before Aubamayeng's wayward spot-kick.
Lacazette failed to hit the target from eight yards and Spurs took advantage, Kane scoring from the spot to equalise after referee Anthony Taylor adjudged he was fouled by Shkodran Mustafi.
Arsenal were also angry as they believed offside should have been given in the build-up but Kane stayed calm amid the chaos to send Leno the wrong way from the spot for his ninth goal in this fixture and keep Spurs four points ahead of Unai Emery's side.
The Gunners, however, have only themselves to blame after spurning that late chance to seal a league double over Spurs.
Spurs show grit but little inspiration
Spurs proved once again they possess real resilience as they battled to earn this point - but there is no escaping this has been an indifferent week for Pochettino's side.
Seven days ago, Tottenham still harboured outside hopes of the Premier League title but a return of one point from away games at Burnley and Chelsea and this Wembley derby against Arsenal have snuffed out those aspirations.
And in the end, they will be grateful to Arsenal's wastefulness for a point which maintains that crucial four-point gap over their rivals in fourth and six over Manchester United in fifth.
There were pluses for Spurs in the outstanding performance of Moussa Sissoko but they currently look a side short on spark, summed up by Kieran Trippier's lack of confidence, the defender who was an England hero when they reached the World Cup semi-final in the summer feeling the full fury of his own fans for one wayward second-half cross.
Tottenham can at least look at that important advantage over Arsenal but they looked short of energy and inspiration here as they take a 3-0 advantage to Borussia Dortmund on Tuesday for the second leg of their Champions League last-16 tie.
Arsenal's self-inflicted wounds
Arsenal manager Emery will have seen plenty to please him in this eventful encounter - but he will know his side missed a huge chance to turn up the pressure on Spurs in the race for a top-four place.
Emery's initial team selection, which saw Aubameyang, Torreira and Mesut Ozil on the bench, raised eyebrows but it almost resulted in a win that would have put them within one point of Spurs, only for Arsenal to suffer from self-inflicted wounds.
Lacazette was a major culprit having been given the nod ahead of Aubameyang, wasting an early chance then repeating his mistake in the second half, skewing wide from close range after superb build-up play from Alex Iwobi and Nacho Monreal.
It would have given Arsenal a two-goal cushion and only increased the tension mounting around Wembley at that time.
Arsenal were aggrieved with the penalty decision, claiming for offside and believing Mustafi's push on Kane was a soft one, although the defender allowed himself to get in a poor position.
The final anguish was Aubameyang's lackadaisical penalty after he was fouled by Davinson Sanchez, showing no urgency or intent and giving Lloris a relative easy save.
This was a result that could have been much better - and Arsenal may yet look back on it as a very damaging one in their pursuit of qualifying for next season's Champions League.
More to follow.
