The warm-up games help them prepare for the big kick-off, which this season is August 5.
They also help clubs look at potential signings, with side’s more often welcoming triallists into their ranks in order to have a closer look at them.
But while the Blues haven’t gone down that route yet under John Mousinho, others in the division have.
Here’s who’s looking at bolstering their ranks with some unattached bargains and the results they’ve picked up so far this summer.
5. Bristol Rovers
Games played: W 9-0 v Melksham Town; W 2-0 v Eastleigh; L 2-1 Cardiff (on aggregate, with two 60-minute games played). Triallists used: 1 (Teo Kurtaran). Photo: Dan Mullan
6. Burton Albion
Games played: L 1-0 v Burnley, D 1-1 Nuneaton Borough, W 4-1 v Alfreton Town. Triallists used: 7 (v Nuneaton) and 4 (v Alfreton). Names unknown. Photo: Michael Steele
7. Cambridge United
Games played: D 1-1 v Cardiff, result unknown v Spurs U21s behind closed doors. Triallists used: 0. Photo: Nathan Stirk
8. Carlisle United
Games played: W 2-1 v Annan Athletic, W 7-0 v Gretna 2008. Triallists used: Dan Langley and Stephen Walker in both games. Photo: Charlotte Tattersall