The Champions League draw from next season will be done by a computer after manual test runs went on for nearly four hours.
The major European competition is set for its biggest set of changes in recent history from next season.
Not only is the Champions League being expanded to 36 teams, the usual eight-group format is being completely scrapped.
In its place, all 36 teams will enter into one league with each side playing eight matches against eight different opponents.
The Champions League draw will look vastly different next year
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One similarity to the current format is teams will still be separated into four pots based on their coefficient ranking.
Teams will face two sides from each pot - including their own - but clubs from the same country will still not be able to face each other in the initial stage.
All the intricacies of the new draw have led to some challenges for UEFA during its trial runs.
UEFA have admitted that doing the draw under the old format with different pots and balls individually being picked out one by one would take up to four hours.
There would also be up to 900 balls due to the complex nature of the draw.
To avoid the draw taking several hours, UEFA have decided to partially computerise it where only the selection of the initial team from pot one is manually picked out.
A computer will then choose that team's eight opponents and work out the fixtures too.
UEFA are confident the computer system will be fair and it will be audited accountancy firm by Ernst & Young.
Clubs that finish in the top eight of the league will automatically qualify for the round-of-16 stage.
The new draw took close to four hours during test runs
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Sides that finish between ninth and 24th will then compete in a two-legged play-off to make it through to the next stage.
The round-of-16 draw will also see some changes with teams being seeded based on their league phase position.
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All three European competitions will adopt a league system
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The knockout phase will then follow a similar system to tennis where the top two seeds won't be able to play each other until the final.
It means that teams will be able to map out their potential route to the Champions League final.
Similar changes are being made to the Europa League and Europa Conference League with both competitions changing from multiple groups to a league phase.
