City boss Stuart Pearce will come under increasing pressure after his side were beaten 2-1 by League One Chesterfield, while Fulham lost 2-1 at home to League Two Wycombe and Middlesbrough were defeated 1-0 by League Two Notts County.

Pearce's team have endured a miserable start to the season, winning just once in their first five matches, after also ending last term with a run of nine defeats in ten matches.

City had been dumped out of the League Cup at the same stage by Doncaster last season and Chesterfield repeated the feat at Saltergate.

Greece striker Georgios Samaras gave City the lead in the 40th minute with a simple finish after Bernardo Corradi's shot had hit a post.

But Roy McFarland's side staged a stunning second half fightback, with Caleb Folan levelling after 51 minutes before Derek Niven grabbed a superb long-range winner in the 67th minute.

Wycombe manager Paul Lambert has experienced the ultimate high in club football after the Scot helped Germany's Borussia Dortmund win the Champions League in 1997.

He has less glamorous ambitions now but League Two leaders Wycombe showed plenty of his cup pedigree with a shock win at Fulham.

Wycombe striker Jermaine Easter opened the scoring with a close-range finish in the eighth minute.

Tommy Mooney put Lambert's side in complete control three minutes before the break when he converted a penalty awarded for Carlos Bocanegra's foul on Easter.

Heidar Helguson brought Chris Coleman's team back into the match with a 47th minute goal, but the west London side couldn't find an equaliser and slumped to another disappointing cup exit after last season's FA Cup defeat against Leyton Orient.

Middlesbrough boss Gareth Southgate included Australia striker Mark Viduka, Germany defender Robert Huth and Spanish midfielder Gaizka Mendieta in his side, but Notts County provided tougher opposition than expected.

County striker Tcham N'Toya stunned last season's UEFA Cup finalists in the 26th minute when he drilled a low drive past Ross Turnbull for the winner.

To add insult to injury for Middlesbrough, County boss Steve Thompson didn't even pick a full-strength team.

Aston Villa manager Martin O'Neill's last match in the League Cup six years ago ended in the glory of winning the competition and he was back in the old routine as his team won 2-1 at Scunthorpe.

O'Neill was in charge of Leicester when they defeated Tranmere in the 2000 final to lift the trophy for the second time in his reign after also beating Middlesbrough in 1997.

Villa went ahead in the 42nd minute when Luke Moore was brought down in the penalty area by Richard Hinds.

Juan Pablo Angel's spot-kick was saved by Joe Murphy but the rebound fell perfectly for the Colombian striker to tap-in the opening goal.

Angel grabbed a second, his 12th goal in 15 League Cup appearances, with a powerful close range header before Scunthorpe's Billy Sharp reduced the deficit.

League One club Doncaster enjoyed a memorable run in the competition last season as they knocked out Premiership sides Aston Villa and Manchester City to reach the quarterfinals.

And they were at it again at Belle Vue as they beat Championship outfit Derby 8-7 on penalties following a 3-3 draw after extra time.

A double strike from Jonathan Forte and one from Brian Stock put Doncaster 3-0 ahead, but Derby staged a remarkable fightback as Steve Howard, Darren Moore and Arturo Lupoli all scored in the last 16 minutes to take the match into extra-time.

On-loan Arsenal striker Lupoli was sent off in extra-time but Sean O'Driscoll's side held their nerve in the shoot-out to secure a place in Saturday's third round draw.