Arsenal have staged a magnificent fightback to thrash Tottenham 5-2 in the north London derby while Manchester United have scrambled a last-gasp 2-1 win over Norwich.

Arsenal appeared to be hurtling towards a disastrous home defeat after an early Louis Saha strike and an Emmanuel Adebayor penalty fired Spurs into a 2-0 lead at the Emirates on Sunday.

But two goals in three minutes from Bacary Sagna and captain Robin van Persie made it 2-2 before Arsenal cut loose in the second half with Tomas Rosicky and a double to Theo Walcott completing a remarkable transformation.

At Carrow Road, Ryan Giggs – playing in his 900th game for United – struck in the 90th minute to clinch a precious victory for Sir Alex Ferguson’s side which saw them reduce Manchester City’s lead at the top to two points.

Arsenal’s win eased the pressure on beleaguered Arsenal manager Arsene Wenger, whose side were still reeling from a heavy Champions League defeat to AC Milan and an FA Cup exit at Sunderland.

The Gunners’ victory also denied Tottenham their first season double over Arsenal for 19 years, and moved Arsenal back into the Champions League qualification places ahead of Chelsea.

While Tottenham claimed the early bragging rights, the game was transformed in three remarkable minutes shortly before half-time in which Arsenal clawed their way back to 2-2.

Sagna pulled the first goal back with a well directed looping header from Mikel Arteta’s cross on 40 minutes.

Three minutes later captain van Persie equalised with a sublime individual effort, carving out space for himself on the edge of the Tottenham area before curling beyond Brad Friedel for 2-2.

Tottenham boss Redknapp moved to stiffen his midfield at half-time, replacing Saha with Sandro and introducing Rafael van der Vaart in place of Niko Kranjcar.

But the changes were unable to halt Arsenal’s momentum, and a sweeping move ended with Rosicky making it 3-2 with a dinked finish on 51 minutes.

With Tottenham reeling, Arsenal maintained the onslaught and Walcott – barracked mercilessly by the home supporters earlier in the game – made it 4-2 on the counter-attack in the 65th minute.

The England midfielder then bagged his second on 68 minutes as the rout continued.

Tottenham’s misery was complete when Scott Parker was sent off in the closing stages for a second yellow card.

In Sunday’s other early kick-off, Manchester United closed the gap on City after Giggs scored to clinch a 2-1 win over Norwich.

Grant Holt had pounced for Norwich on 83 minutes to cancel out Paul Scholes’ seventh-minute opener at Carrow Road.

But Giggs stole in to save United at the death in a remarkable finale for Sir Alex Ferguson’s men.