Ange Postecoglou will be delighted to finally get some new faces through the Tottenham door but it will present him with some tough decisions in the Europa League.

Tottenham have added Bayern Munich attacker Mathys Tel to their squad in addition to the signings of centre-back Kevin Danso from Lens and goalkeeper Antonin Kinsky, who arrived from Slavia Prague earlier in the January transfer window. Postecoglou desperately needed extra bodies in his squad and fresh legs amid the injury crisis that continues to grip the club.

The question is exactly what does that mean for his Premier League squad and the one he must name in the Europa League, which brings with it vastly different rules. Spurs finished in fourth place in the league stage which means they will head straight to the round of 16 next month where they will play one of Galatasaray, Real Sociedad, Midtjylland and AZ Alkmaar.

READ MORE: Tottenham's January transfer window work leaves Ange Postecoglou with one worrying problem

READ MORE: Kevin Danso decision in the most unlikely of places proves why he's Postecoglou's perfect transfer

Here's a look at what the three new signings mean for both the Premier League and Europa League squads. We're not including the various players currently out on loan, so that can be a problem for next season.

Premier League

There are no problems with this squad at all right now and that's mostly because of a wonderful Premier League rule - for Spurs anyway - that states that a club's under-21 players do not need to be included on their 25-man squad list yet are eligible to play in the Premier League.

To be considered an under-21 player for this current Premier League season, players must have been born on or after January 1, 2003. That means both Kinsky and Tel do not have to be registered in the main squad and neither will Luka Vuskovic next season or the on-loan Yang Min-hyeok.

It also seems that Danso qualifies as a homegrown player in Premier League terms because he was in the youth academies at Reading and MK Dons for years before leaving England at the age of 16 and later returning for a season at Southampton.

The Premier League rules state that "a "Home Grown Player" means a player who, irrespective of nationality or age, has been registered with any club affiliated to The Football Association or the Football Association of Wales for a period, continuous or not, of three entire seasons, or 36 months, before his 21st birthday (or the end of the season during which he turns 21)."

With that in mind, here's how the club's Premier League squad will look and how they will fit into it just fine.

Premier League non-homegrown players (15 currently, 17 maximum allowed): Guglielmo Vicario, Pedro Porro, Radu Dragusin, Destiny Udogie, Cristian Romero, Micky van de Ven, Sergio Reguilon, Rodrigo Bentancur, Yves Bissouma, Wilson Odobert, Dejan Kulusevski, Richarlison, Son Heung-min, Timo Werner, Pape Matar Sarr.

Premier League homegrown players (9 currently and eight minimum required): Dominic Solanke, Kevin Danso, Fraser Forster, Brandon Austin, Alfie Whiteman, Ben Davies, James Maddison, Brennan Johnson, Djed Spence.

Notable Under-21s players: Archie Gray, Lucas Bergvall, Antonin Kinsky, Mathys Tel, Dane Scarlett.

Europa League

Now here's where things get really complicated. Yes, we've been here before with Tottenham, on many occasions, and it will be some time before Spurs sort out their European squad because they need some of the new batch of 18-year-old signings to eventually become club-trained players three years down the line.

That's because UEFA's rules state that no club can have more than 25 players on their A List during the season, of whom at least two must be goalkeepers. The rules then say that "as a minimum, eight of those 25 places are reserved exclusively for 'locally trained players' and no club may have more than four 'association-trained players' listed among those eight places. If a club have fewer than eight locally trained players in their squad, then the maximum number of players on List A is reduced accordingly".

'What is a locally-trained player?' you might feel the need to ask. Well, there are two types. One is the 'club-trained players', those who were on a club's books for three entire seasons or 36 months between the ages of 15 and 21.

The other is 'association-trained players', those who were on another club's books in the same association for three entire seasons or 36 months between the ages of 15 and 21. Danso will not fit into that latter category because he left England at the age of 16.

Then there is a B List for players born on, or after, January 1, 2003 and who have been eligible to play for the club for any uninterrupted period of two years since their 15th birthday – or for a total of three consecutive years with a maximum of one loan period to a club from the same association for a period not longer than one year. Players aged 16 may be submitted if they have been registered with the club for the previous two years without interruption. None of Spurs' current crop of teenage signings fit that criteria as they have just joined.

In all, as you can see below, Spurs' Europa League squad is overstuffed in both non-locally trained spots and association trained ones. That they only have two club-trained players in goalkeepers Brandon Austin and Alfie Whiteman when they need to register four, means they have to leave two spots open in what should be a 25-man squad but instead is a 23-man one.

Are you still with us? Of those remaining 21 spots, a maximum of 17 can be non-locally trained - they have 19 - and anything beyond four association trained spots - Spurs have seven - must be absorbed into the main squad number. So in essence Tottenham now have 26 players to fit into 21 spots, keeping aside Austin and Whiteman's protected club-trained category.

Tottenham can make three changes to the previous squad for the knockout rounds and it doesn't matter if the players have played in European competition earlier this season. Djed Spence and Sergio Reguilon were not able to be registered in the league stage due to the number of players being reached and Postecoglou will have to decide if Spence comes in now and if so for who.

Then there are Kinsky, Tel and Danso to fit in, but only three of those four can come into the squad for these stages and that's down to Postecoglou to decide.

Danso will likely replace the unfortunate Radu Dragusin, who is out for the remainder of the season. The Spurs boss might decide that he has enough goalkeepers to go without Kinsky in Europe and he could also perhaps lose Fraser Forster from the squad to fit in Spence for this stage if he trusts Guglielmo Vicario, Austin and Whiteman as enough cover.

With Tel, a decision perhaps would have to be made to include him over someone like Timo Werner, who is unlikely to have a long-term future at this stage but that would be an experienced Champions League winner lost. It could be that Postecoglou loses others to injury before those March games come along which will make the decisions more straight-forward.

European non-locally trained players (19 currently, 17 maximum): Guglielmo Vicario, Antonin Kinsky, Pedro Porro, Kevin Danso, Radu Dragusin, Destiny Udogie, Cristian Romero, Micky van de Ven, Sergio Reguilon, Rodrigo Bentancur, Yves Bissouma, Wilson Odobert, Dejan Kulusevski, Richarlison, Son Heung-min, Timo Werner, Pape Matar Sarr, Lucas Bergvall, Mathys Tel.

Association trained players (7 currently, four can be used in exclusive slots): Dominic Solanke, Fraser Forster, Ben Davies, James Maddison, Brennan Johnson, Djed Spence, Archie Gray.

Club trained players (2 currently, four required): Brandon Austin, Alfie Whiteman.

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