Chelsea went to the top of the early Premier League table after coming from behind to beat Reading 4-2 in a pulsating game at Stamford Bridge.

Frank Lampard put the Blues ahead from the penalty spot in the 18th minute after Chris Gunter had felled Eden Hazard in the box.

But Pavel Pogrebnyak drew the Royals level on 25 minutes with a superb header from Garath McCleary's cross and Reading fans were in dreamland four minutes later when Petr Cech let in Danny Guthrie's free-kick.

But the Blues' blushes were saved with a goalkeeping clanger by Adam Federici - who had also made a howler against Stoke on Saturday. This time, the Reading keeper failed to save a swerving long-range effort from Gary Cahill on 69 minutes.

Fernando Torres then put Chelsea ahead with nine minutes remaining, tapping in Ashley Cole's cross, although replays showed he was offside.

As Reading went in desperate search of an equaliser, Federici came up for Ian Harte's corner in injury time and Chelsea hit the Royals on the break, with Branislav Ivanovic slotting home from close range to seal a remarkable comeback.

The victory put Chelsea top of the table for the first time since November 2010, a fact pointed out by manager Roberto Di Matteo ahead of a fixture brought forward due to the European champions' involvement in the UEFA Super Cup.

But the Italian will be concerned at how hard his side made it for themselves against the Championship winners, who had several other chances to score.

Artist

For 25 minutes, it was the Chelsea show, with Hazard showing the skills that on Tuesday saw Di Matteo dub him an "artist".

The Belgian had taken less than two minutes to make his mark on his league debut at Wigan and it could have been the same story on Wednesday had he not screwed Juan Mata's through ball wide.

Hazard, Mata and Ramires were constantly on the move behind Torres and more fine football saw the latter force a good stop from Federici.

Torres went close to a superb solo goal before Chelsea inevitably took the lead in the 18th minute, the skills of Hazard again the inspiration.

The £32million man tormented Gunter to distraction and when the leg was dangled, he hit the deck, giving referee Lee Mason no choice but to award the penalty, Lampard giving Federici no chance from the spot.

If Chelsea thought the floodgates would open, they were given the rudest possible awakening as Reading amazingly turned the game on its head in the space of four minutes.

Pogrebnyak equalised with a brilliant header, getting in front of Cahill to glance home McCleary's cross.

But the visitors had an almighty howler from Cech to thank for going in front, the goalkeeper embarrassingly allowing Guthrie's powerful free-kick to spin off his body and into the net.

John Terry powered over a header from Mata's free-kick and Hazard's blockbuster was also too high but Chelsea had lost the initiative and had lost their way at the back.

Torrid time

Terry was being given a torrid time on his 550th club appearance and conceded a free-kick that Harte whipped in and Alex Pearce somehow failed to connect with.

Torres could also have done better than glance wide a pinpoint Hazard cross on the stroke of half-time.

Ivanovic blazed over after the restart but Chelsea were struggling to penetrate a wall of yellow as Di Matteo sent on Oscar for Ramires before the hour mark.

Jem Karacan became the first player booked for upending Mata and Pogrebnyak quickly followed for tripping Cole but the home side were just as ragged.

They were rushing what few shots they had, Hazard's blocked effort typical of their floundering, and Di Matteo took action again when he threw on Daniel Sturridge for John Obi Mikel in the 68th minute.

It immediately paid off in unexpected fashion thanks to another goalkeeping howler from Federici, who palmed Cahill's swerving 25-yarder into his own net.

Reading sent on Adam Le Fondre for Karacan and Noel Hunt for Pogrebnyak but the force was with Chelsea and Mata screwed wide before they completed their own comeback thanks to a huge slice of luck.

The build-up was the equal of anything they had produced all evening but Torres appeared clearly offside tapping home Cole's low cross. However it was allowed to stand by Mason and his assistants.

Reading went for broke late on, with Hal Robson-Kanu replacing McCleary and Federici bombing forward and they were caught out when Hazard squared for Ivanovic to tap home.

Read Official Team Sheet

Teams 

Chelsea  Cech, Ivanovic, Cahill, Terry, Cole, Mikel (Sturridge 68), Lampard, Hazard, Mata (Meireles 84), Ramires (Oscar 57), Torres
Subs Not Used  Turnbull, Bertrand, Essien, Romeu
Booked 
Goals  Lampard (pen) 18, Cahill 69, Torres 81, Ivanovic 90

Reading Federici, Gunter, Pearce, Gorkss, Harte, McAnuff, Guthrie, Karacan (Le Fonde71), Leigertwood, McCleary (Robinson-Kanu 86, Pogrebnyak (Hunt 77)
Subs Not Used  Tabb, Mariappa, McCarthy, Cummings
Booked  Karacan, Pogrebnyak
Goals  Pogrebnyak 24, Guthrie 28

Attendance  41,733

Referee  L. Mason