Nottingham Forest have left two first-team players out of their Europa League group stage squad - including new big-money signing Omari Hutchinson.
Forest submitted their squad, which can contain a maximum of 25 players, to UEFA on Thursday.
The club paid a £37.5 million fee to sign attacking midfielder Hutchinson from recently-relegated Ipswich last month.
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However, the England U21 international will play no part in Europe until at least the knockout stages, where Forest will have another opportunity to register him should they reach that stage.
Also not included is Arsenal loanee Oleksandr Zinchenko, who moved to the City Ground in a hastily-arranged deal on deadline day.
Fellow new arrivals James McAtee, Douglas Luiz and Arnaud Kalimuendo are included, however.
On the face of it, the decision not to register Hutchinson may seem like something of a baffling move, given the significant outlay Forest splashed out to bring him to the club.
UEFA, however, have strict rules when it comes to squad selection - with the most pertinent of those relating to homegrown players and offering a potential reason why both players were left out.
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Each squad must have eight players who were trained in England for three years between 15 and 21, with McAtee among the players who counts towards that criteria.
Callum Hudson-Odoi, Elliot Anderson and Morgan Gibbs-White also count as homegrown, as well as former Liverpool defender Nico Williams.
But the issue for Forest is that, out of those eight players, four must have been trained at the club between the ages of 15 and 21.
Out of the club's senior players, only midfielder and club captain Ryan Yates falls under that category, meaning Forest cannot fulfil that particular criteria.
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However, UEFA does allow clubs to leave empty spaces in their squad to represent the homegrown at club players they are unable to include.
As a result, Forest have only been able to select 22 players out of 25 - meaning both Hutchinson and Zinchenko are among those to miss out.
According to the Daily Mail, Hutchinson is said to be 'shocked' by his exclusion from the squad.
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It is a similar situation at Spurs, where Mathys Tel, Yves Bissouma and Radu Dragusin have all been excluded from their Champions League squad selection.
Like Forest, they have only filled 22 places, with reserve goalkeeper Brandon Austin their only homegrown at club player selected.
Liverpool are in a slightly different position with winger Federico Chiesa, who was their only senior player not included in the Champions League squad.
With UEFA rules stipulating that a maximum of 17 non-homegrown players can be selected in the squad, Arne Slot's choice was essentially between Chiesa and 17-year-old England youth winger Rio Ngumoha, who does not yet class as homegrown because he has not turned 18.
Ryan Smart