Nottingham Forest caused one of the upsets of the FA Cup third round with a 3-0 win over Barclays Premier League opponents Manchester City, heaping further pressure on Blues boss Mark Hughes.

The Coca-Cola Championship side spoiled what was supposed to be a day of celebration for City, who had unveiled new signing Wayne Bridge on the pitch before kick off, when they stunned their hosts with two goals in four minutes as half-time approached.

Nathan Tyson struck first after 38 minutes with a thunderous volley from 25 yards and Robert Earnshaw made no mistake from close range for the second. City failed to improve in the second half.

It was the worst possible outcome for Hughes, who is under huge pressure to perform having been bankrolled by the club's owners the Abu Dhabi United Group, and their miserable afternoon reached a new low with 15 minutes remaining when Dietmar Hamann threw the ball straight to Joe Garner, who made no mistake with his finish from the edge of the box.

Blue Square Premier strugglers Forest Green were denied a famous FA Cup third round victory as Derby fought back to win a seven-goal thriller at the New Lawn.

Rams substitute Steven Davies scored the winner from the penalty spot three minutes from time, but the Coca-Cola Championship strugglers looked to be crashing out when Rovers took a two-goal lead inside 20 minutes.

Goals from Jonathan Smith and Alex Lawless put Jim Harvey's side in command, but Rob Hulse threw the Rams a lifeline by pulling a goal back six minutes before the break and a Martin Albrechtsen header restored parity on the stroke of half-time.

Paul Stonehouse put the home side back in front against the run of play with 18 minutes remaining, but Paul Green levelled five minutes later.

Chelsea were unable to book their place in the next round after being held to a 1-1 draw by League One side Southend with a goal in stoppage time. Salomon Kalou's header on the half-hour put the Blues in front but Peter Clarke was the hero for the Shrimpers.

Earlier in the day League One side Hartlepool caused the first upset of the round when they knocked out Premier League Stoke 2-0 at Victoria Park.

Michael Nelson headed in Matty Robson's left-wing free-kick four minutes after half-time before David Foley sealed the win with a 25-yard volley which flew into the top right corner of the net 15 minutes from time.

There were shock results among teams from outside the Premier League too, with Blue Square Premier side Torquay knocking Championship outfit Blackpool out of the cup with a 1-0 win.

Torquay took the lead just after the half-hour when Matt Green latched onto a Kevin Nicholson long ball before driving past Paul Rachubka from 20 yards. Kettering added to the Blue Square Premier's representation in round four after they beat Eastwood Town 2-1 at Rockingham Road.

Arsenal saw off the challenge of Championship Plymouth with a 3-1 win at the Emirates Stadium as.stand-in captain Robin van Persie grabbed a brace.

There will be no fairytale run for Barnsley this year after they lost 3-0 at West Ham. The Tykes, who knocked out Liverpool and Chelsea en route to the semi-finals last season, were behind in the 10th minute when Herita Ilunga ghosted in at the far post to tap in a Mark Noble cross from five yards. Noble added the second and Carlton Cole sealed the result in the 68th minute when he turned in Ilunga's cross.

Sunderland beat Bolton 2-1 with Djibril Cisse scoring the decisive goal, while their north-east rivals Newcastle were held goalless at Hull in another all-Premier League affair. Shay Given, who earlier this week revealed he might be prepared to leave the club, was the star of the show in the Magpies goal.

Fulham beat Sheffield Wednesday 2-1 with a late goal from Andrew Johnson while Middlesbrough held off a late rally to beat Blue Square Premier side Barrow 2-1 at the Riverside thanks to an Afonso Alves double.

Leon Osman broke the deadlock two minutes before half-time as Everton beat Macclesfield 1-0 at Moss Rose, while West Brom were held to a 1-1 draw at home to Peterborough, Craig Mackail-Smith forcing the replay with a close-range finish three minutes from time.