Cardiff City and Newport County have both made fixture changes following the League Cup draw.
The Bluebirds are at home against Portsmouth, which means the scheduled pre-season fixture between the clubs has been called off.
County have been drawn at home against Southend United, but the tie will take place at the Roots Hall stadium in Essex. That will allow work on Newport’s Rodney Parade pitch to be completed.
Cardiff were due to play League One Pompey at Cardiff City Stadium on Friday, July 28, but the game has been cancelled after the two teams were drawn against each other in the Carabao League Cup first round.
Manager Neil Warnock will now arrange alternative opposition at home.
The Bluebirds begin their summer fixtures against Taffs Well on Friday, July 7 before a tour of Devon and Cornwall sees them play a series of fixtures at first team and under-23 levels.
They also play Shrewsbury Town away on Tuesday, July 25.
Tickets are on sale for the Taffs Well v Cardiff City pre-season fixtures at Rhiw Ddar on Friday, July 14 (7pm).
They are available from the Taffs Well clubhouse, which is open every night from 7.30pm, and the Rose and Crown. Adult tickets are £10, concessions £5.
Bluebirds manager Neil Warnock has confirmed City will be sending first team players for the friendly to help support The Wellman v Cancer appeal.
Cardiff City’s full pre-season fixtures
July
Friday 14: Taff’s Well (away 7pm, Rhiw Ddar)
Monday 17: AFC Tavistock (away 7pm, Langsford Park)
Wednesday 19: Bodmin Town (away 7pm, Priory Park)
Thursday, 20: Under-23 v AFC St. Austell (away 7pm, Poltair Park)
Friday 21: Plymouth Argyle FC (away 7pm, Home Park)
Saturday 22: Under-23 Bideford AFC (away 2pm, The Sports Ground)
Tuesday, 25: Shrewsbury Town (away 7pm, The Greenhous Meadow)
Friday 28/Saturday 29: To be arranged (home, Cardiff City Stadium)
The 35 ties League Cup ties will be played in the week commencing Monday, August 7.
Hull City and Middlesbrough have been handed a bye into the second round, having finished above Sunderland in the Premier League last season.
There are 12 former League Cup winners in the first round, with five-time champions Aston Villa the most successful side entering at this stage, ahead of four-time winners Nottingham Forest.
Villa have been handed an away tie at Colchester, while Forest host League One side Shrewsbury.
The final of this season’s competition will take place at Wembley on Sunday, February 25.
The full draw for the first round of the EFL Cup:
North Section: Coventry v Blackburn, Nottingham Forest v Shrewsbury, Bradford v Doncaster, Mansfield v Rochdale, Grimsby v Derby, Barnsley v Morecambe, Oldham v Burton, Wigan v Blackpool, Bury v Sunderland, Sheffield Wednesday v Chesterfield, Accrington v Preston, Fleetwood v Carlisle, Rotherham v Lincoln, Sheffield United v Walsall, Scunthorpe v Notts County, Crewe v Bolton, Leeds v Port Vale.
South Section: Birmingham v Crawley, Exeter City v Charlton Athletic, QPR v Northampton Town, Newport County v Southend, Bristol City v Plymouth, Cardiff City v Portsmouth, Millwall v Stevenage, Oxford v Cheltenham, Wimbledon v Brentford, Norwich v Swindon, Bristol Rovers v Cambridge, Peterborough v Barnet, Wycombe v Fulham, Colchester v Aston Villa, Wolves v Yeovil, Reading v Gillingham, Forest Green v MK Dons, Luton v Ipswich.