Accrington Stanley produced the upset of the Carabao Cup first round as they dumped Championship Preston out with a hard-fought 3-2 win at the Wham Stadium thanks to Billy Kee's last-minute strike.
The Lancashire side took the lead through Ben Richards-Everton after 20 minutes and were ahead for 50 further minutes until Jordan Hugill levelled up proceedings. Jordan Clark looked to have won it for Stanley with just four minutes left, only for Hugill to strike again with 90 minutes up.
However, there was still time for substitute Kee to find a winner, converting Tom Dallison's cross to secure a memorable victory.
Che Adams netted a hat-trick as Birmingham swept into the second round with a 5-1 win over Crawley.
David Davis and substitute Robert Tesche were also on target while Panutche Camara netted a late consolation for Crawley.
Bristol City made it two wins in a row as they coasted past League One side Plymouth 5-0 at Ashton Gate.
Jens Hegeler, Nathan Baker and Korey Smith put the Robins 3-0 up inside 20 minutes, Freddy Hinds slotted in a fourth after 39 minutes and substitute Jamie Paterson wrapped things up with 11 minutes left.
Grimsby's clash with Derby was abandoned after just 19 minutes due to a waterlogged pitch at Blundell Park.
The Rams were leading 1-0 following a fifth-minute header by defender Richard Keogh before the game was temporarily halted after a downpour and then eventually called off by referee Trevor Kettle.
The first came at Oakwell where Barnsley survived a scare against Morecambe, but there was also one at the Kassam Stadium, where Cheltenham's Mohamed Eisa struck an extra-time winner for the visitors.
After going behind to Ollie Lancashire's 25th-minute opener, Norwich responded with three goals in 17 minutes to suppress a resurgent Swindon side at Carrow Road.
Paul Mullin scored with half an hour remaining and Town tested Angus Gunn on numerous occasions as the minutes ebbed away, though the Championship side managed to hold on.
The evening wouldn't have been complete without extra-time and plenty of action ensued as it got underway. Brentford avoided a scalp at the hands of AFC Wimbledon with extra-time goals from Ollie Watkins and Justin Shaibu at Kingsmeadow, while Football League debutantes Forest Green Rovers pushed MK Dons to the limit before Gboly Ariyibi's 100th-minute winner.
There were comprehensive victories over lower league opposition for Ipswich and Fulham - who registered 2-0 wins over Luton and Wycombe respectively - and Mark Warburton's Nottingham Forest beat Shrewsbury 2-1, though Shaun Walley's penalty 11 minutes from time made for a nervy finish at the County Ground.
Charlton reached the second round with a 2-1 win over Exeter despite having Andrew Crofts send off, Doncaster beat Bradford 3-2 and League One newboys Blackburn impressed with a confident 3-1 win at Coventry.
Cardiff overcame Portsmouth with a 2-1 win after extra-time, Nouha Dicko's 76th-minute goal was enough to send Wolves through to the second round at the expense of League Two Yeovil and in the evening's 8pm kick-off, Reading quelled fears of a stuttering start to the season as Liam Kelly notched twice in 15 second-half minutes to put Gillingham to the sword.
Millwall put right the wrongs of their Championship defeat to Forest at the weekend, with a 2-0 victory at home to Stevenage, while Yeni Ngbakoto's 36th-minute header was the difference in QPR's 1-0 victory over Northampton and both Wigan and Rotherham were 2-1 winners against Blackpool and Lincoln respectively.